diff --git a/TeachingRecordSystem/src/TeachingRecordSystem.Core/Dqt/Queries/FindPotentialDuplicateContactsQuery.cs b/TeachingRecordSystem/src/TeachingRecordSystem.Core/Dqt/Queries/FindPotentialDuplicateContactsQuery.cs
index 5416a2f65..8c87464f4 100644
--- a/TeachingRecordSystem/src/TeachingRecordSystem.Core/Dqt/Queries/FindPotentialDuplicateContactsQuery.cs
+++ b/TeachingRecordSystem/src/TeachingRecordSystem.Core/Dqt/Queries/FindPotentialDuplicateContactsQuery.cs
@@ -26,6 +26,7 @@ public record FindPotentialDuplicateContactsResult
     public required string? StatedFirstName { get; init; }
     public required string? StatedMiddleName { get; init; }
     public required string? StatedLastName { get; init; }
+    public required string? PreviousLastName { get; init; }
     public required DateOnly? DateOfBirth { get; init; }
     public required string? NationalInsuranceNumber { get; init; }
     public required string? EmailAddress { get; init; }
diff --git a/TeachingRecordSystem/src/TeachingRecordSystem.Core/Dqt/QueryHandlers/CreateContactHandler.cs b/TeachingRecordSystem/src/TeachingRecordSystem.Core/Dqt/QueryHandlers/CreateContactHandler.cs
index 48ea3842b..0d0b06333 100644
--- a/TeachingRecordSystem/src/TeachingRecordSystem.Core/Dqt/QueryHandlers/CreateContactHandler.cs
+++ b/TeachingRecordSystem/src/TeachingRecordSystem.Core/Dqt/QueryHandlers/CreateContactHandler.cs
@@ -85,6 +85,7 @@ string GetDescription()
                         Contact.Fields.FirstName => $"  - First name: '{duplicate.FirstName}'",
                         Contact.Fields.MiddleName => $"  - Middle name: '{duplicate.MiddleName}'",
                         Contact.Fields.LastName => $"  - Last name: '{duplicate.LastName}'",
+                        Contact.Fields.dfeta_PreviousLastName => $"  - Previous last name: '{duplicate.PreviousLastName}'",
                         Contact.Fields.BirthDate => $"  - Date of birth: '{duplicate.DateOfBirth:dd/MM/yyyy}'",
                         Contact.Fields.dfeta_NINumber => $"  - National Insurance number: '{duplicate.NationalInsuranceNumber}'",
                         Contact.Fields.EMailAddress1 => $"  - Email address: '{duplicate.EmailAddress}'",
diff --git a/TeachingRecordSystem/src/TeachingRecordSystem.Core/Dqt/QueryHandlers/FindPotentialDuplicateContactsHandler.cs b/TeachingRecordSystem/src/TeachingRecordSystem.Core/Dqt/QueryHandlers/FindPotentialDuplicateContactsHandler.cs
index 125c96c46..635ecda3c 100644
--- a/TeachingRecordSystem/src/TeachingRecordSystem.Core/Dqt/QueryHandlers/FindPotentialDuplicateContactsHandler.cs
+++ b/TeachingRecordSystem/src/TeachingRecordSystem.Core/Dqt/QueryHandlers/FindPotentialDuplicateContactsHandler.cs
@@ -129,6 +129,7 @@ public async Task<FindPotentialDuplicateContactsResult[]> ExecuteAsync(FindPoten
                     StatedFirstName = match.dfeta_StatedFirstName,
                     StatedMiddleName = match.dfeta_StatedMiddleName,
                     StatedLastName = match.dfeta_StatedLastName,
+                    PreviousLastName = match.dfeta_PreviousLastName,
                     DateOfBirth = match.BirthDate.ToDateOnlyWithDqtBstFix(isLocalTime: false),
                     NationalInsuranceNumber = !string.IsNullOrEmpty(match.dfeta_NINumber) ? match.dfeta_NINumber : null,
                     EmailAddress = match.EMailAddress1
diff --git a/TeachingRecordSystem/tests/TeachingRecordSystem.Core.Dqt.CrmIntegrationTests/QueryTests/CreateContactTests.cs b/TeachingRecordSystem/tests/TeachingRecordSystem.Core.Dqt.CrmIntegrationTests/QueryTests/CreateContactTests.cs
index f0250b999..76b2ce21f 100644
--- a/TeachingRecordSystem/tests/TeachingRecordSystem.Core.Dqt.CrmIntegrationTests/QueryTests/CreateContactTests.cs
+++ b/TeachingRecordSystem/tests/TeachingRecordSystem.Core.Dqt.CrmIntegrationTests/QueryTests/CreateContactTests.cs
@@ -118,6 +118,7 @@ await _dataScope.OrganizationService.CreateAsync(new Contact()
                     StatedFirstName = firstName,
                     StatedMiddleName = middleName,
                     StatedLastName = lastName,
+                    PreviousLastName = null,
                     DateOfBirth = dateOfBirth,
                     EmailAddress = email,
                     NationalInsuranceNumber = nino