diff --git a/internal/modules/inventory/transfers/services/transfer.service.go b/internal/modules/inventory/transfers/services/transfer.service.go
index e74332bc..1d69de6f 100644
--- a/internal/modules/inventory/transfers/services/transfer.service.go
+++ b/internal/modules/inventory/transfers/services/transfer.service.go
@@ -232,11 +232,24 @@ func (s *transferService) CreateOne(c *fiber.Ctx, req *validation.TransferReques
 	}
 
 	for _, delivery := range req.Deliveries {
-		// Skip supplier validation if SupplierID is 0 (optional)
+
 		if delivery.SupplierID == 0 {
 			continue
 		}
 
+		if delivery.VehiclePlate == "" {
+			return nil, fiber.NewError(fiber.StatusBadRequest, "Vehicle plate wajib diisi ketika supplier dipilih")
+		}
+		if delivery.DriverName == "" {
+			return nil, fiber.NewError(fiber.StatusBadRequest, "Driver name wajib diisi ketika supplier dipilih")
+		}
+		if delivery.DeliveryCost <= 0 {
+			return nil, fiber.NewError(fiber.StatusBadRequest, "Delivery cost harus lebih dari 0 ketika supplier dipilih")
+		}
+		if delivery.DeliveryCostPerItem <= 0 {
+			return nil, fiber.NewError(fiber.StatusBadRequest, "Delivery cost per item harus lebih dari 0 ketika supplier dipilih")
+		}
+
 		supplier, err := s.SupplierRepo.GetByID(c.Context(), uint(delivery.SupplierID), nil)
 		if err != nil {
 			if errors.Is(err, gorm.ErrRecordNotFound) {
diff --git a/internal/modules/inventory/transfers/validations/transfer.validation.go b/internal/modules/inventory/transfers/validations/transfer.validation.go
index e2f357f3..89676a41 100644
--- a/internal/modules/inventory/transfers/validations/transfer.validation.go
+++ b/internal/modules/inventory/transfers/validations/transfer.validation.go
@@ -21,11 +21,11 @@ type TransferDeliveryProduct struct {
 }
 
 type TransferDelivery struct {
-	DeliveryCost        float64                   `json:"delivery_cost" validate:"required"`
-	DeliveryCostPerItem float64                   `json:"delivery_cost_per_item" validate:"required"`
+	DeliveryCost        float64                   `json:"delivery_cost"`
+	DeliveryCostPerItem float64                   `json:"delivery_cost_per_item"`
 	DocumentIndex       int                       `json:"document_index" validate:"omitempty,min=-1" default:"-1"`
-	DriverName          string                    `json:"driver_name" validate:"required"`
-	VehiclePlate        string                    `json:"vehicle_plate" validate:"required"`
+	DriverName          string                    `json:"driver_name"`
+	VehiclePlate        string                    `json:"vehicle_plate"`
 	SupplierID          uint                      `json:"supplier_id" `
 	Products            []TransferDeliveryProduct `json:"products" validate:"required,dive"`
 }