# Error code

Code	Textual description of the error code	HTTP status
1021	request validation error	400
5102	undefined transaction type	404
8301	unexpected db error	500
5400	couldn't receive project data	500
5406	invalid project secret	400
8008	project doesn't exist	404
5000	transaction already exists	400
5101	undefined transaction status	404
5107	transaction limit doesn't exist	404
5006	transaction amount limit is over	400
5003	an error occurred while creating transaction	500
5202	request failed	500
1022	couldn't parse response body	500
5205	unavailable project server	500
3108	card doesn't exist	500
3010	inoperable transaction status for this method	400

**Provider error codes** Errors describing the reason of payment decline are transmitted with status “failed”. Such errors are reported as additional value parameters in: * Webhook on payment status * When requesting for a transaction status * In One-click to pay in without a payment page

Error code	Close caption
100	undefined error
101	3DS authentication failed
102	invalid card
103	exceeds amount limit
104	exceeds transaction frequency limit
105	transaction declined by an issuer
106	transaction declined by an acquirer
107	unavailable issuer
108	unavailable acquirer
109	payment is forbidden for the merchant
110	stolen card
111	blocked card
112	non existent card
113	lost card
114	card has expired
115	incorrect CVV/CVC
116	incorrect card number
117	incorrect card expiration date
118	insufficient funds
119	suspicious client
120	user did not pay
121	invalid threeD secure parameters