diff --git a/src/Somnia.GuestLog/Components/Pages/StayExport/StayExportList.razor b/src/Somnia.GuestLog/Components/Pages/StayExport/StayExportList.razor
index 840e5e7..43f620c 100644
--- a/src/Somnia.GuestLog/Components/Pages/StayExport/StayExportList.razor
+++ b/src/Somnia.GuestLog/Components/Pages/StayExport/StayExportList.razor
@@ -52,8 +52,13 @@
         </TemplateColumn>
         <PropertyColumn Property="x => Localizer.GetEnumValue(x.ExportResult)"
                         Title="@LanguageLocale.dto_StayExportFile_ExportResult" />
-        <PropertyColumn Property="x => x.ExportedPath" Title="@LanguageLocale.dto_StayExportFile_ExportedPath" Hidden />
         <PropertyColumn Property="x => x.ExportTime" Title="@LanguageLocale.dto_StayExportFile_ExportTime" />
+        <TemplateColumn Title="@LanguageLocale.dto_StayExportFile_ExportDetails">
+            <CellTemplate>
+                <MudIconButton Size="@Size.Small" Icon="@Icons.Material.Outlined.Info"
+                               OnClick="() => ShowExportDetails(context.Item)" />
+            </CellTemplate>
+        </TemplateColumn>
 
         <TemplateColumn CellClass="d-flex justify-between" Title="Options" StickyRight Hideable="false"
                         ShowColumnOptions="false">
@@ -118,7 +123,21 @@
     {
         string jsonParams = JsonSerializer.Serialize(dto.ExportParams, options: new() { WriteIndented = true });
 
-        await DialogService.ShowMessageBoxAsync("Details", jsonParams);
+        await DialogService.ShowMessageBoxAsync("Details", (MarkupString)$"<pre>{jsonParams}</pre>");
+    }
+
+    private async Task ShowExportDetails(StayExportFileDTO dto)
+    {
+        if (string.IsNullOrEmpty(dto.ExportDetails))
+        {
+            userMessage.ShowMessage("This ExportFile doesn't have any export details", MessageKind.Info);
+            return;
+        }
+
+        using var jDoc = JsonDocument.Parse(dto.ExportDetails);
+        string jsonDetails = JsonSerializer.Serialize(jDoc, new JsonSerializerOptions { WriteIndented = true });
+
+        await DialogService.ShowMessageBoxAsync("Details", (MarkupString)$"<pre>{jsonDetails}</pre>");
     }
 
     private async Task BtnDownloadFile(StayExportFileDTO item)
diff --git a/src/Somnia.GuestLog/Infrastructure/DbConsts.cs b/src/Somnia.GuestLog/Infrastructure/DbConsts.cs
index 605bd6e..7ed1c53 100644
--- a/src/Somnia.GuestLog/Infrastructure/DbConsts.cs
+++ b/src/Somnia.GuestLog/Infrastructure/DbConsts.cs
@@ -6,5 +6,7 @@ public static class DbConsts
     public const string DbType_Timestamptz_0 = "timestamp(0) with time zone";
     public const string DbType_Timestamptz_3 = "timestamp(3) with time zone";
 
+    public const string DbType_jsonb = "jsonb";
+
     public const string PK_NotApply = "N/A";
 }
diff --git a/src/Somnia.GuestLog/Infrastructure/EntityConfigs/StayExportFileEntityConfig.cs b/src/Somnia.GuestLog/Infrastructure/EntityConfigs/StayExportFileEntityConfig.cs
index a76653f..38df0f1 100644
--- a/src/Somnia.GuestLog/Infrastructure/EntityConfigs/StayExportFileEntityConfig.cs
+++ b/src/Somnia.GuestLog/Infrastructure/EntityConfigs/StayExportFileEntityConfig.cs
@@ -25,6 +25,9 @@ public class StayExportFileEntityConfig : IEntityTypeConfiguration<StayExportFil
         builder.Property(e => e.ExportedPath)
             .HasMaxLength(256);
 
+        builder.Property(e => e.ExportDetails)
+            .HasColumnType(DbConsts.DbType_jsonb);
+
 
         builder.Property(e => e.ExportTime)
             .IsRequired()
diff --git a/src/Somnia.GuestLog/Infrastructure/Migrations/20260908172441_StayExportFile_AddColumn_ExportDetails.Designer.cs b/src/Somnia.GuestLog/Infrastructure/Migrations/20260908172441_StayExportFile_AddColumn_ExportDetails.Designer.cs
new file mode 100644
index 0000000..084e0f2
--- /dev/null
+++ b/src/Somnia.GuestLog/Infrastructure/Migrations/20260908172441_StayExportFile_AddColumn_ExportDetails.Designer.cs
@@ -0,0 +1,252 @@
+// <auto-generated />
+using System;
+using System.Collections.Generic;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+using Somnia.GuestLog.Infrastructure;
+
+#nullable disable
+
+namespace Somnia.GuestLog.Infrastructure.Migrations
+{
+    [DbContext(typeof(GuestLogContext))]
+    [Migration("20260908172441_StayExportFile_AddColumn_ExportDetails")]
+    partial class StayExportFile_AddColumn_ExportDetails
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "10.0.7")
+                .HasAnnotation("Proxies:ChangeTracking", false)
+                .HasAnnotation("Proxies:CheckEquality", false)
+                .HasAnnotation("Proxies:LazyLoading", true)
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("GuestDocumentStayEntry", b =>
+                {
+                    b.Property<long>("StayEntryId")
+                        .HasColumnType("bigint");
+
+                    b.Property<long>("GuestDocumentsId")
+                        .HasColumnType("bigint");
+
+                    b.Property<int>("GuestDocumentsVersion")
+                        .HasColumnType("integer");
+
+                    b.HasKey("StayEntryId", "GuestDocumentsId", "GuestDocumentsVersion");
+
+                    b.HasIndex("GuestDocumentsId", "GuestDocumentsVersion");
+
+                    b.ToTable("GuestDocumentStayEntry");
+                });
+
+            modelBuilder.Entity("Somnia.GuestLog.Models.Entities.GuestDocument", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<long>("Id"));
+
+                    b.Property<int>("Version")
+                        .HasColumnType("integer");
+
+                    b.Property<DateOnly>("BirthDate")
+                        .HasColumnType("date");
+
+                    b.Property<DateTime>("CreateTime")
+                        .HasColumnType("timestamp(3) with time zone");
+
+                    b.Property<string>("DocumentNum")
+                        .IsRequired()
+                        .HasMaxLength(64)
+                        .HasColumnType("character varying(64)");
+
+                    b.Property<string>("DocumentType")
+                        .IsRequired()
+                        .HasMaxLength(8)
+                        .HasColumnType("character varying(8)");
+
+                    b.Property<string>("EmailAddress")
+                        .HasMaxLength(256)
+                        .HasColumnType("character varying(256)");
+
+                    b.Property<string>("Gender")
+                        .HasMaxLength(1)
+                        .HasColumnType("character varying(1)");
+
+                    b.Property<bool>("IsLastVersion")
+                        .HasColumnType("boolean");
+
+                    b.Property<DateOnly>("IssueDate")
+                        .HasColumnType("date");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasMaxLength(64)
+                        .HasColumnType("character varying(64)");
+
+                    b.Property<string>("Nationality")
+                        .IsRequired()
+                        .HasMaxLength(3)
+                        .HasColumnType("character varying(3)");
+
+                    b.Property<string>("PhoneNumber")
+                        .HasMaxLength(32)
+                        .HasColumnType("character varying(32)");
+
+                    b.Property<string>("SupportNum")
+                        .HasMaxLength(10)
+                        .HasColumnType("character varying(10)");
+
+                    b.Property<string>("Surname")
+                        .IsRequired()
+                        .HasMaxLength(64)
+                        .HasColumnType("character varying(64)");
+
+                    b.Property<string>("Surname2")
+                        .HasMaxLength(64)
+                        .HasColumnType("character varying(64)");
+
+                    b.Property<DateTime>("UpdateTime")
+                        .HasColumnType("timestamp(3) with time zone");
+
+                    b.ComplexProperty(typeof(Dictionary<string, object>), "AddressDetails", "Somnia.GuestLog.Models.Entities.GuestDocument.AddressDetails#GuestAddress", b1 =>
+                        {
+                            b1.Property<string>("Address")
+                                .HasMaxLength(128)
+                                .HasColumnType("character varying(128)");
+
+                            b1.Property<string>("AddressCity")
+                                .HasMaxLength(128)
+                                .HasColumnType("character varying(128)");
+
+                            b1.Property<string>("AddressCountry")
+                                .IsRequired()
+                                .HasMaxLength(3)
+                                .HasColumnType("character varying(3)");
+
+                            b1.Property<string>("AddressProvince")
+                                .HasMaxLength(128)
+                                .HasColumnType("character varying(128)");
+
+                            b1.Property<string>("AddressState")
+                                .HasMaxLength(128)
+                                .HasColumnType("character varying(128)");
+
+                            b1.Property<string>("ZipCode")
+                                .HasMaxLength(12)
+                                .HasColumnType("character varying(12)");
+                        });
+
+                    b.HasKey("Id", "Version");
+
+                    b.ToTable("GuestDocument", (string)null);
+                });
+
+            modelBuilder.Entity("Somnia.GuestLog.Models.Entities.StayEntry", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<long>("Id"));
+
+                    b.Property<DateTime>("CreateTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<DateTime>("DateIn")
+                        .HasColumnType("timestamp(0) with time zone");
+
+                    b.Property<DateTime>("DateOut")
+                        .HasColumnType("timestamp(0) with time zone");
+
+                    b.Property<string>("PaymentMethod")
+                        .IsRequired()
+                        .HasMaxLength(5)
+                        .HasColumnType("character varying(5)");
+
+                    b.Property<int>("RoomCount")
+                        .HasColumnType("integer");
+
+                    b.Property<string>("RoomNumber")
+                        .HasMaxLength(32)
+                        .HasColumnType("character varying(32)");
+
+                    b.Property<DateTime>("UpdateTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("StayEntry", (string)null);
+                });
+
+            modelBuilder.Entity("Somnia.GuestLog.Models.Entities.StayExportFile", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<long>("Id"));
+
+                    b.Property<string>("ExportDetails")
+                        .HasColumnType("jsonb");
+
+                    b.Property<int>("ExportFormat")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("ExportResult")
+                        .HasColumnType("integer");
+
+                    b.Property<DateTime>("ExportTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("ExportedPath")
+                        .HasMaxLength(256)
+                        .HasColumnType("character varying(256)");
+
+                    b.ComplexProperty(typeof(Dictionary<string, object>), "ExportParams", "Somnia.GuestLog.Models.Entities.StayExportFile.ExportParams#StayExportParams", b1 =>
+                        {
+                            b1.IsRequired();
+
+                            b1.Property<DateTime?>("ExportPeriodEnd");
+
+                            b1.Property<DateTime?>("ExportPeriodStart");
+
+                            b1.Property<int>("ExportType");
+
+                            b1
+                                .ToJson("ExportParams")
+                                .HasColumnType("jsonb");
+                        });
+
+                    b.HasKey("Id");
+
+                    b.ToTable("StayExportFile", (string)null);
+                });
+
+            modelBuilder.Entity("GuestDocumentStayEntry", b =>
+                {
+                    b.HasOne("Somnia.GuestLog.Models.Entities.StayEntry", null)
+                        .WithMany()
+                        .HasForeignKey("StayEntryId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("Somnia.GuestLog.Models.Entities.GuestDocument", null)
+                        .WithMany()
+                        .HasForeignKey("GuestDocumentsId", "GuestDocumentsVersion")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}
diff --git a/src/Somnia.GuestLog/Infrastructure/Migrations/20260908172441_StayExportFile_AddColumn_ExportDetails.cs b/src/Somnia.GuestLog/Infrastructure/Migrations/20260908172441_StayExportFile_AddColumn_ExportDetails.cs
new file mode 100644
index 0000000..7f1a00b
--- /dev/null
+++ b/src/Somnia.GuestLog/Infrastructure/Migrations/20260908172441_StayExportFile_AddColumn_ExportDetails.cs
@@ -0,0 +1,28 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace Somnia.GuestLog.Infrastructure.Migrations
+{
+    /// <inheritdoc />
+    public partial class StayExportFile_AddColumn_ExportDetails : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<string>(
+                name: "ExportDetails",
+                table: "StayExportFile",
+                type: "jsonb",
+                nullable: true);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "ExportDetails",
+                table: "StayExportFile");
+        }
+    }
+}
diff --git a/src/Somnia.GuestLog/Infrastructure/Migrations/GuestLogContextModelSnapshot.cs b/src/Somnia.GuestLog/Infrastructure/Migrations/GuestLogContextModelSnapshot.cs
index a16ff5b..f4b45a2 100644
--- a/src/Somnia.GuestLog/Infrastructure/Migrations/GuestLogContextModelSnapshot.cs
+++ b/src/Somnia.GuestLog/Infrastructure/Migrations/GuestLogContextModelSnapshot.cs
@@ -193,6 +193,9 @@ namespace Somnia.GuestLog.Infrastructure.Migrations
 
                     NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<long>("Id"));
 
+                    b.Property<string>("ExportDetails")
+                        .HasColumnType("jsonb");
+
                     b.Property<int>("ExportFormat")
                         .HasColumnType("integer");
 
diff --git a/src/Somnia.GuestLog/Models/DTOs/StayExportFileDTO.cs b/src/Somnia.GuestLog/Models/DTOs/StayExportFileDTO.cs
index eed1c97..d8b94d3 100644
--- a/src/Somnia.GuestLog/Models/DTOs/StayExportFileDTO.cs
+++ b/src/Somnia.GuestLog/Models/DTOs/StayExportFileDTO.cs
@@ -13,6 +13,8 @@ public class StayExportFileDTO
     public StayExportFileResult? ExportResult { get; set; }
 
     public string? ExportedPath { get; set; }
+    
+    public string? ExportDetails { get; set; }
 
 
     public DateTime? ExportTime { get; set; }
diff --git a/src/Somnia.GuestLog/Models/Entities/StayExportFile.cs b/src/Somnia.GuestLog/Models/Entities/StayExportFile.cs
index 724049e..60eb53e 100644
--- a/src/Somnia.GuestLog/Models/Entities/StayExportFile.cs
+++ b/src/Somnia.GuestLog/Models/Entities/StayExportFile.cs
@@ -17,6 +17,11 @@ public class StayExportFile : BaseEntity
     /// </summary>
     public string? ExportedPath { get; set; }
 
+    /// <summary>
+    /// A JSON column to store details about the exported file.
+    /// This details can contain information about errors, which stays where included, etc.
+    /// </summary>
+    public string? ExportDetails { get; set; }
 
     /// <summary>
     /// Date/Time when export file was generated.
diff --git a/src/Somnia.GuestLog/Models/EntityMapping.cs b/src/Somnia.GuestLog/Models/EntityMapping.cs
index 019a902..4af4e7b 100644
--- a/src/Somnia.GuestLog/Models/EntityMapping.cs
+++ b/src/Somnia.GuestLog/Models/EntityMapping.cs
@@ -67,6 +67,7 @@ internal static class EntityMapping
             ExportParams = exportParamsDto,
             ExportResult = entity.ExportResult,
             ExportedPath = entity.ExportedPath,
+            ExportDetails = entity.ExportDetails,
             ExportTime = entity.ExportTime,
         };
     }
diff --git a/src/Somnia.GuestLog/Program.cs b/src/Somnia.GuestLog/Program.cs
index 44b56c4..a146770 100644
--- a/src/Somnia.GuestLog/Program.cs
+++ b/src/Somnia.GuestLog/Program.cs
@@ -1,3 +1,4 @@
+using FluentStorage;
 using FluentValidation;
 using Microsoft.AspNetCore.Localization;
 using Microsoft.EntityFrameworkCore;
@@ -115,4 +116,7 @@ app.MapStaticAssets();
 app.MapRazorComponents<App>()
     .AddInteractiveServerRenderMode();
 
+//Activate S3 storage.
+AwsS3Storage.Use();
+
 app.Run();
diff --git a/src/Somnia.GuestLog/Resources/LanguageLocale.resx b/src/Somnia.GuestLog/Resources/LanguageLocale.resx
index 0b9252b..73211ec 100644
--- a/src/Somnia.GuestLog/Resources/LanguageLocale.resx
+++ b/src/Somnia.GuestLog/Resources/LanguageLocale.resx
@@ -154,6 +154,7 @@
   <data name="dto.StayExportFile.ExportParams" xml:space="preserve"><value>Export Params</value></data>
   <data name="dto.StayExportFile.ExportResult" xml:space="preserve"><value>Export Result</value></data>
   <data name="dto.StayExportFile.ExportedPath" xml:space="preserve"><value>Export Path</value></data>
+  <data name="dto.StayExportFile.ExportDetails" xml:space="preserve"><value>Export Details</value></data>
   <data name="dto.StayExportFile.ExportTime" xml:space="preserve"><value>Export Time</value></data>
 
   <data name="dto.StayExportParams.ExportType" xml:space="preserve"><value>Export Type</value></data>
diff --git a/src/Somnia.GuestLog/Services/Entity/StayExportFileEntityService.cs b/src/Somnia.GuestLog/Services/Entity/StayExportFileEntityService.cs
index fe97fe2..f22609f 100644
--- a/src/Somnia.GuestLog/Services/Entity/StayExportFileEntityService.cs
+++ b/src/Somnia.GuestLog/Services/Entity/StayExportFileEntityService.cs
@@ -36,6 +36,7 @@ public class StayExportFileEntityService(
             ExportParams = exportParams,
             ExportResult = dto.ExportResult.Value,
             ExportedPath = dto.ExportedPath,
+            ExportDetails = dto.ExportDetails,
             ExportTime = dto.ExportTime?.ToUniversalTime() ?? DateTime.UtcNow,
         };
 
diff --git a/src/Somnia.GuestLog/Services/StayExport/IStayExportFormatProvider.cs b/src/Somnia.GuestLog/Services/StayExport/IStayExportFormatProvider.cs
index 60de696..3ef03f6 100644
--- a/src/Somnia.GuestLog/Services/StayExport/IStayExportFormatProvider.cs
+++ b/src/Somnia.GuestLog/Services/StayExport/IStayExportFormatProvider.cs
@@ -14,6 +14,6 @@ public interface IStayExportFormatProvider
     /// </summary>
     /// <param name="stayList">List of Stays to export</param>
     /// <param name="dataStream">Stream to copy exported data.</param>
-    public Task<StayExportFileResult> ExportDataAsync(IEnumerable<StayEntryDTO> stayList, Stream dataStream);
+    public Task<(StayExportFileResult fileResult, string? exportDetails)> ExportDataAsync(IEnumerable<StayEntryDTO> stayList, Stream dataStream);
 
 }
\ No newline at end of file
diff --git a/src/Somnia.GuestLog/Services/StayExport/StayExportProviderJson.cs b/src/Somnia.GuestLog/Services/StayExport/StayExportProviderJson.cs
index 02ccf19..2f80d72 100644
--- a/src/Somnia.GuestLog/Services/StayExport/StayExportProviderJson.cs
+++ b/src/Somnia.GuestLog/Services/StayExport/StayExportProviderJson.cs
@@ -13,15 +13,18 @@ public class StayExportProviderJson : IStayExportFormatProvider
         => $"{Enum.GetName(GetFormat())}_{exportTime.ToFileTimeUtc()}.{fileExtension}";
 
 
-    public async Task<StayExportFileResult> ExportDataAsync(IEnumerable<StayEntryDTO> stayList, Stream dataStream)
+    public async Task<(StayExportFileResult fileResult, string? exportDetails)> ExportDataAsync(IEnumerable<StayEntryDTO> stayList, Stream dataStream)
     {
         if (!stayList.Any())
         {
-            return StayExportFileResult.NoData;
+            return (fileResult: StayExportFileResult.NoData, exportDetails: null);
         }
 
         // Convert to JSON.
         await JsonSerializer.SerializeAsync(dataStream, stayList);
-        return StayExportFileResult.OK;
+
+        List<string> exportDetails = [.. stayList.Where(s => s.Id != null).Select(s => s.Id?.ToString() ?? "")];
+        string details = JsonSerializer.Serialize(exportDetails);
+        return (fileResult: StayExportFileResult.OK, exportDetails: details);
     }
 }
\ No newline at end of file
diff --git a/src/Somnia.GuestLog/Services/StayExport/StayExportProviderSpainParteViajeros.cs b/src/Somnia.GuestLog/Services/StayExport/StayExportProviderSpainParteViajeros.cs
index 68fc1be..6b47947 100644
--- a/src/Somnia.GuestLog/Services/StayExport/StayExportProviderSpainParteViajeros.cs
+++ b/src/Somnia.GuestLog/Services/StayExport/StayExportProviderSpainParteViajeros.cs
@@ -1,4 +1,5 @@
 using System.Diagnostics;
+using System.Text.Json;
 using System.Xml.Serialization;
 using FluentValidation;
 using Microsoft.Extensions.Options;
@@ -17,6 +18,9 @@ public class StayExportProviderSpainParteViajeros(
 {
     private const string fileExtension = "xml";
 
+    private const string ExportDetailsResult_Error = "Error";
+    private const string ExportDetailsResult_Ok = "Ok";
+
     private const string PersonRole = "VI";
     private const string PersonRelation = "OT";
 
@@ -31,32 +35,35 @@ public class StayExportProviderSpainParteViajeros(
 
     private readonly StayExportSpainParteViajerosConfig config = configOptions.Value;
 
+
     public StayExportFormat GetFormat() => StayExportFormat.SpainParteViajeros;
     public string GetFilename(DateTime exportTime)
         => $"{Enum.GetName(GetFormat())}_{exportTime.ToFileTimeUtc()}.{fileExtension}";
 
-    public async Task<StayExportFileResult> ExportDataAsync(IEnumerable<StayEntryDTO> stayList, Stream dataStream)
+    public async Task<(StayExportFileResult fileResult, string? exportDetails)> ExportDataAsync(IEnumerable<StayEntryDTO> stayList, Stream dataStream)
     {
         if (string.IsNullOrEmpty(config.CodigoEstablecimiento))
         {
             logger.LogError("StayExportProviderSpainParteViajeros - Config error: CodigoEstablecimiento is not configured!");
-            return StayExportFileResult.ExportError;
+            return (fileResult: StayExportFileResult.ExportError, exportDetails: null);
         }
 
         if (!stayList.Any())
         {
-            return StayExportFileResult.NoData;
+            return (fileResult: StayExportFileResult.NoData, exportDetails: null);
         }
 
+        List<StayExportDetails> stayExportDetails = [];
         ComunicacionValidator comunicacionValidator = new();
 
         List<Comunicacion> comunicacionsList = [];
         foreach (StayEntryDTO stay in stayList)
         {
-            (Comunicacion? comunicacion, string code) = await GetComunicacionFromStay(stay);
+            (Comunicacion? comunicacion, string errorMsg) = await GetComunicacionFromStay(stay);
             if (comunicacion == null)
             {
-                logger.LogWarning("StayExportProviderSpainParteViajeros - Stay (ID: {id}) can't be exported: Code: {code}", stay.Id, code);
+                logger.LogWarning("StayExportProviderSpainParteViajeros - Stay (ID: {id}) can't be exported: Error: {code}", stay.Id, errorMsg);
+                stayExportDetails.Add(new(StayId: stay.Id ?? -1, ExportResult: ExportDetailsResult_Error, Details: errorMsg));
                 continue;
             }
 
@@ -64,11 +71,13 @@ public class StayExportProviderSpainParteViajeros(
             if (!errors.IsValid)
             {
                 logger.LogWarning("StayExportProviderSpainParteViajeros - Stay (ID: {id}) is invalid: Errors: {errors}", stay.Id, errors.Errors);
+                stayExportDetails.Add(new(StayId: stay.Id ?? -1, ExportResult: ExportDetailsResult_Error, Details: errors.ToString()));
                 continue;
             }
 
             comunicacionsList.Add(comunicacion);
             logger.LogInformation("StayExportProviderSpainParteViajeros - Stay (ID: {id}) Exported OK", stay.Id);
+            stayExportDetails.Add(new(StayId: stay.Id ?? -1, ExportResult: ExportDetailsResult_Ok, Details: null));
         }
 
         Peticion peticion = new()
@@ -83,12 +92,13 @@ public class StayExportProviderSpainParteViajeros(
         XmlSerializer serializer = new(typeof(Peticion));
         serializer.Serialize(dataStream, peticion);
 
-        return StayExportFileResult.OK;
+        string details = JsonSerializer.Serialize(stayExportDetails);
+        return (fileResult: StayExportFileResult.OK, exportDetails: details);
     }
 
     #region Internal Methods
 
-    private async Task<(Comunicacion? comunicacion, string code)> GetComunicacionFromStay(StayEntryDTO stay)
+    private async Task<(Comunicacion? comunicacion, string errorMsg)> GetComunicacionFromStay(StayEntryDTO stay)
     {
         Debug.Assert(stay.Id != null
             && stay.DateIn != null
@@ -136,7 +146,7 @@ public class StayExportProviderSpainParteViajeros(
                 {
                     return (
                         comunicacion: null,
-                        code: "NoCodigoMunicipio"
+                        errorMsg: "Can't get codigo municio"
                     );
                 }
             }
@@ -167,7 +177,7 @@ public class StayExportProviderSpainParteViajeros(
                 contrato = contrato,
                 persona = personasList
             },
-            code: "OK");
+            errorMsg: "OK");
     }
 
     private static string? GetTipoDocumentoFromGuest(GuestDocumentDTO doc)
@@ -309,6 +319,8 @@ public class StayExportProviderSpainParteViajeros(
 
     #region Export Data Classes
 
+    private record StayExportDetails(long StayId, string ExportResult, string? Details);
+
     [XmlRoot(ElementName = "peticion", Namespace = XmlNamespace_Peticion)]
     public class Peticion
     {
diff --git a/src/Somnia.GuestLog/Services/StayExport/StayExportService.cs b/src/Somnia.GuestLog/Services/StayExport/StayExportService.cs
index bdf2894..557760e 100644
--- a/src/Somnia.GuestLog/Services/StayExport/StayExportService.cs
+++ b/src/Somnia.GuestLog/Services/StayExport/StayExportService.cs
@@ -58,7 +58,7 @@ public class StayExportService(
         {
             //Create Format provider and export data to stream.
             var provider = providerFactory.GetProvider(format);
-            exportResult = await provider.ExportDataAsync(stayList, exportedDataStream);
+            (exportResult, stayExport.ExportDetails) = await provider.ExportDataAsync(stayList, exportedDataStream);
 
             // "Rewind" stream so it can be read from the begining when uploading.
             exportedDataStream.Seek(0, SeekOrigin.Begin);