A computer-implemented method is provided. A first transaction from a sender made via the sender PSP server to a receiver via a receiver PSP server is identified. When the first transaction is pending, at least one subsequent transaction from the sender to the receiver is detected. Transaction parameters of the at least one subsequent transaction is compared with transaction parameters of the first transaction for determining that the first transaction and the at least one subsequent transaction are associated with a single payment. One or more messages are transmitted, when one of the first transaction and the at least one subsequent transaction is identified as successful to indicate that one of the first transaction and the at least one subsequent transaction is successful and to discard other transactions.