diff --git a/ValidacionDocumentosIdentidadVIES.vb b/ValidacionDocumentosIdentidadVIES.vb
index 0e4810d..902104e 100644
--- a/ValidacionDocumentosIdentidadVIES.vb
+++ b/ValidacionDocumentosIdentidadVIES.vb
@@ -1,17 +1,68 @@
 Imports System.Net.Http
 Imports System.Text.Json
+Imports System.Text.Json.Serialization
 Imports System.Text.RegularExpressions
 Imports System.Threading.Tasks
 
-Public Class VatValidationResult
-    Public Property IsValid As Boolean
-    Public Property Name As String
-    Public Property Address As String
-    Public Property RawJson As String
-    Public Property ErrorMessage As String
+' ============================================================
+'   CLASES DE MODELO PARA EL JSON DEVUELTO POR VIES (REST)
+' ============================================================
+
+Public Class ViesApproximate
+    <JsonPropertyName("matchName")>
+    Public Property MatchName As Integer
+
+    <JsonPropertyName("matchStreet")>
+    Public Property MatchStreet As Integer
+
+    <JsonPropertyName("matchPostalCode")>
+    Public Property MatchPostalCode As Integer
+
+    <JsonPropertyName("matchCity")>
+    Public Property MatchCity As Integer
+
+    <JsonPropertyName("matchCompanyType")>
+    Public Property MatchCompanyType As Integer
 End Class
 
-Public Class ValidacionDocumentosIdentidad
+Public Class ViesRestResponse
+    <JsonPropertyName("isValid")>
+    Public Property IsValid As Boolean
+
+    <JsonPropertyName("requestDate")>
+    Public Property RequestDate As Date
+
+    <JsonPropertyName("userError")>
+    Public Property UserError As String
+
+    <JsonPropertyName("name")>
+    Public Property Name As String
+
+    <JsonPropertyName("address")>
+    Public Property Address As String
+
+    <JsonPropertyName("requestIdentifier")>
+    Public Property RequestIdentifier As String
+
+    <JsonPropertyName("originalVatNumber")>
+    Public Property OriginalVatNumber As String
+
+    <JsonPropertyName("vatNumber")>
+    Public Property VatNumber As String
+
+    <JsonPropertyName("viesApproximate")>
+    Public Property ViesApproximate As ViesApproximate
+
+    ' Campo adicional para errores locales
+    Public Property LocalError As String
+End Class
+
+
+' ============================================================
+'   VALIDADOR COMPLETO VAT + VIES REST
+' ============================================================
+
+Public Class ValidacionDocumentosIdentidadVIES
 
     ' -----------------------------
     ' 1) Validación de formato VAT
@@ -44,7 +95,7 @@ Public Class ValidacionDocumentosIdentidad
         {"SE", "^[0-9]{12}$"},
         {"SI", "^[0-9]{8}$"},
         {"SK", "^[0-9]{10}$"},
-        {"XI", "^[0-9]{9}$"} ' Irlanda del Norte
+        {"XI", "^[0-9]{9}$"}
     }
 
     Public Shared Function IsValidVatFormat(countryCode As String,
@@ -73,41 +124,35 @@ Public Class ValidacionDocumentosIdentidad
     ' 3) Validación VIES vía REST (ASÍNCRONA)
     ' -----------------------------
     Public Shared Async Function ValidateVatAsync(countryCode As String,
-                                                  vatNumber As String) As Task(Of VatValidationResult)
+                                                  vatNumber As String) As Task(Of ViesRestResponse)
 
-        Dim result As New VatValidationResult()
+        Dim result As New ViesRestResponse()
 
         Try
+            ' Normalización
+            countryCode = countryCode.Trim().ToUpper()
+            vatNumber = vatNumber.Trim().ToUpper()
+
             ' Validación de formato previa
             If Not IsValidVatFormat(countryCode, vatNumber) Then
-                result.IsValid = False
-                result.ErrorMessage = $"Formato VAT inválido para {countryCode}"
+                result.LocalError = $"Formato VAT inválido para {countryCode}"
                 Return result
             End If
 
             Dim url = $"https://ec.europa.eu/taxation_customs/vies/rest-api/ms/{countryCode}/vat/{vatNumber}"
 
-            Dim json As String = Await _http.GetStringAsync(url)
-            result.RawJson = json
+            Dim json As String = Await _http.GetStringAsync(url).ConfigureAwait(False)
 
-            Dim doc = JsonDocument.Parse(json)
-            Dim root = doc.RootElement
-
-            result.IsValid = root.GetProperty("isValid").GetBoolean()
-
-            If result.IsValid Then
-                result.Name = root.GetProperty("traderName").GetString()
-                result.Address = root.GetProperty("traderAddress").GetString()
-            End If
+            result = JsonSerializer.Deserialize(Of ViesRestResponse)(json)
 
         Catch ex As HttpRequestException
-            result.ErrorMessage = "Error HTTP: " & ex.Message
+            result.LocalError = "Error HTTP: " & ex.Message
 
         Catch ex As TaskCanceledException
-            result.ErrorMessage = "Timeout al consultar VIES"
+            result.LocalError = "Timeout al consultar VIES"
 
         Catch ex As Exception
-            result.ErrorMessage = "Error inesperado: " & ex.Message
+            result.LocalError = "Error inesperado: " & ex.Message
         End Try
 
         Return result
@@ -115,12 +160,16 @@ Public Class ValidacionDocumentosIdentidad
 
 
     ' -----------------------------
-    ' 4) Validación VIES vía REST (SINCRONA)
+    ' 4) Validación VIES vía REST (SINCRONA SEGURA PARA WPF)
     ' -----------------------------
     Public Shared Function ValidateVat(countryCode As String,
-                                       vatNumber As String) As VatValidationResult
+                                           vatNumber As String) As ViesRestResponse
 
-        Return ValidateVatAsync(countryCode, vatNumber).GetAwaiter().GetResult()
+        Return Task.Run(
+            Async Function()
+                Return Await ValidateVatAsync(countryCode, vatNumber).ConfigureAwait(False)
+            End Function
+        ).Result
 
     End Function
 
diff --git a/tsUtilidades.vbproj b/tsUtilidades.vbproj
index 54d52bc..561cd97 100644
--- a/tsUtilidades.vbproj
+++ b/tsUtilidades.vbproj
@@ -16,11 +16,12 @@
 		<TargetFramework>net8.0</TargetFramework>
 		<PackageId>tsUtilidades</PackageId>
 		<PackageTags>net8.0, libreria</PackageTags>
-		<Version>1.1.19</Version>
+		<Version>1.1.21</Version>
 		<Authors>Manuel</Authors>
 		<Company>Tecnosis S.A</Company>
 		<Description>Utilidades Varias</Description>
 		<PackageReleaseNotes>
+			- 2026-07-22 1.1.21 Corrección de clase ValidacionDocumentosIdentidad
 			- 2026-07-22 1.1.19 Nueva Clase ValidacionDocumentosIdentidad para documentos extranjeros
 			- 2026-05-29 1.1.18 Corrección rutina LeeMysql y LeeMysqlBytArray para que como maximo se admitan 2048 caracteres string
 			- 2026-05-29 1.1.17 Corrección rutina LeeMysql para que como maximo se admitan 2048 caracteres string