Remittance business of remittance bank means that the customer entrusts the bank to remit the money to the designated collection account of other banks through the large and small payment systems, and it has been correctly received.

Acknowledgment characters are transmission control characters sent by the receiving station to the sending station in data communication. Indicates that the sent data has been confirmed to have been received correctly. ACK signals are usually ASCII characters, which are different in different protocols.