1 files changed, 16 insertions, 14 deletions
diff --git a/app/api/vendors/route.ts b/app/api/vendors/route.ts
index 760f183e..27b79385 100644
--- a/app/api/vendors/route.ts
+++ b/app/api/vendors/route.ts
@@ -162,20 +162,22 @@ export async function POST(request: NextRequest) {
       )
     }
 
-    // Check for existing taxId
-    const existingVendor = await db
-      .select({ id: vendors.id })
-      .from(vendors)
-      .where(eq(vendors.taxId, vendorData.taxId))
-      .limit(1)
-
-    if (existingVendor.length > 0) {
-      return NextResponse.json(
-        {
-          error: `이미 등록된 사업자등록번호입니다. (Tax ID ${vendorData.taxId} already exists in the system)`
-        },
-        { status: 400 }
-      )
+    // Check for existing taxId (only if taxId is provided)
+    if (vendorData.taxId && vendorData.taxId.trim()) {
+      const existingVendor = await db
+        .select({ id: vendors.id })
+        .from(vendors)
+        .where(eq(vendors.taxId, vendorData.taxId))
+        .limit(1)
+
+      if (existingVendor.length > 0) {
+        return NextResponse.json(
+          {
+            error: `이미 등록된 사업자등록번호입니다. (Tax ID ${vendorData.taxId} already exists in the system)`
+          },
+          { status: 400 }
+        )
+      }
     }
 
     // Create vendor and handle files in transaction