ToolerCat / Decline Codes / Decline code 30 — Format error

Decline code 30 — Format error

Format error. Malformed message. Usually an integration bug — check the request to the acquirer.

ISO 8583 response code 30.

Code

30 ISO 8583

Meaning

Format error

Type

hard decline

Retry?

No (fix request)

What to do

Malformed message. Usually an integration bug — check the request to the acquirer.

Tell the customer

“Payment could not be processed.”