US Patent 11915232 Offline transaction system and method

A method is provided for performing a transaction. The method includes, in an offline mode, payee and payer devices communicating to determine transaction details including a transaction amount. A payer payment application generates a transaction request including request transaction details, stores the transaction request, and updates a payer available funds amount at least partially in accordance with the transaction amount. A payee payment application generates a transaction confirmation including confirmation transaction details, stores the transaction confirmation, and updates a payee available funds amount at least partially in accordance with the transaction amount. In an online mode, the payer payment application provides the transaction request to a payment processing device, the payee payment application provides the transaction confirmation to the payment processing device, and the payment processing device compares the request transaction details and confirmation transaction details and causes the transaction to be selectively performed depending on results of the comparison.