diff --git a/smssend/smssend.py b/smssend/smssend.py
index 401f6d8..2dc02dd 100644
--- a/smssend/smssend.py
+++ b/smssend/smssend.py
@@ -182,7 +182,7 @@ class SMSEngine:
 		else:
 			return None
 
-	async def check_sms_code(self, code_id: str, vcode: str) -> bool:
+	async def check_sms_code(self, code_id: str, vcode: str, mark_used: bool = True) -> bool:
 		env = ServerEnv()
 		async with get_sor_context(env, 'smssend') as sor:
 			code_info = await sor.R('validatecode', {'id': code_id})
@@ -204,7 +204,8 @@ class SMSEngine:
 				debug(f'check_sms_code():timeout ')
 				return False
 
-			await sor.U('validatecode', {'id': code_id, 'del_flg': '1'})
+			if mark_used:
+				await sor.U('validatecode', {'id': code_id, 'del_flg': '1'})
 			debug(f'check_sms_code(): return True ')
 			return True