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Quick answer
Do not mix sandbox and live environments. A payment is processed only after the server verifies the PayTR callback and signature; a browser redirect alone is not proof.
Steps to follow
- For a failed payment, check the transaction and never charge twice. Track the callback; use the transaction number for refunds or invoices and never request card details.
- For a failed payment, check the transaction and never charge twice. Track the callback; use the transaction number for refunds or invoices and never request card details.
Safe payment and invoice
For a failed payment, check the transaction and never charge twice. Track the callback; use the transaction number for refunds or invoices and never request card details.