diff --git a/internal/contract/letter_outgoing_contract.go b/internal/contract/letter_outgoing_contract.go
index 504df92..ece9a40 100644
--- a/internal/contract/letter_outgoing_contract.go
+++ b/internal/contract/letter_outgoing_contract.go
@@ -109,6 +109,7 @@ type OutgoingLetterResponse struct {
 	ApprovalFlowID        *uuid.UUID                         `json:"approval_flow_id,omitempty"`
 	RevisionNumber        int                                `json:"revision_number"`
 	CreatedBy             uuid.UUID                          `json:"created_by"`
+	CreatedName           string                             `json:"created_name"`
 	CreatedAt             time.Time                          `json:"created_at"`
 	UpdatedAt             time.Time                          `json:"updated_at"`
 	IsRead                bool                               `json:"is_read"`
diff --git a/internal/service/letter_outgoing_service.go b/internal/service/letter_outgoing_service.go
index 1701729..4d6b2a0 100644
--- a/internal/service/letter_outgoing_service.go
+++ b/internal/service/letter_outgoing_service.go
@@ -1558,6 +1558,7 @@ func transformLetterToResponse(letter *entities.LetterOutgoing) *contract.Outgoi
 		ApprovalFlowID:        letter.ApprovalFlowID,
 		RevisionNumber:        letter.RevisionNumber,
 		CreatedBy:             letter.CreatedBy,
+		CreatedName:           letter.Creator.Name,
 		CreatedAt:             letter.CreatedAt,
 		UpdatedAt:             letter.UpdatedAt,
 	}