Discover Payment Decline Code
Discover Decline Code 78: Invalid or Nonexistent Account
Category Card or Account StatusRetry Guidance Conditional Decline (Editorial Classification)By Payment Defender Editorial TeamUpdated July 17, 2026Last reviewed July 17, 2026
What Discover Decline Code 78 Means
Discover decline code 78 (Invalid or Nonexistent Account) indicates that the account is invalid, inactive, or does not exist.
Where the Response May Come From
Code 78 means the account involved is invalid or does not exist, sometimes seen on new accounts not yet fully activated. It reflects account status against issuer records, so the processor response is the reference.
Common Reasons for This Response
Common causes include an inactive, closed, or nonexistent account.
Should the Merchant Retry the Payment?
A retry may succeed only if the account is valid and active; if it does not exist or is not activated, code 78 will repeat, so confirm the situation before reattempting.
Recommended Merchant Action
Ask the customer to confirm the account details or use a different card, and note that newly issued accounts may need activation with the bank.
What to Tell the Customer
Ask the customer to verify their card details or use a different card, and to contact their bank if the account is new.
How to Reduce Similar Payment Failures
Tracking code 78 helps flag activation and account-status issues, especially on newly issued cards, before they cause avoidable declines.
Important Limitations
Decline-code meanings vary by processor, gateway, and payment environment, and issuers do not always disclose the specific reason behind a response. The retry classification on this page is Payment Defender editorial guidance, not an official network rule. Merchants should confirm handling with their processor or gateway.
Related Decline Codes
Sources and Review Information
Last reviewed July 17, 2026
Raw network-response codes are supplemental to the complete processor or gateway response. Meanings and recommended actions can vary by issuer, processor, gateway, card network, payment method, region, and merchant configuration.