All Worldpay codes
WORLDPAY · REFUSAL CODE

Worldpay
3

Invalid acceptor, or invalid merchant or service provider.

Worldpay saysIntegration issue
3

Invalid acceptor, or invalid merchant or service provider.

What it means

Merchant account issue

The merchant account is not set up, not active, or not allowed to process this payment.

What to do

Check the account configuration with your provider.

Don't retry as-isWho can fix it: You, the merchant
Yuno response codeINVALID_MERCHANT
Source:Worldpay docs — Refusal response codes (Access Worldpay)

Reference only. Codes and descriptions come from each provider's public documentation. The Yuno response code is a reference mapping and does not guarantee how a specific transaction is processed.