US Patent 7734544 Authorization and capture with multiple currencies

Techniques are presented for authorization and capture with multiple funding sources and currencies. A transaction amount associated with a target currency is authorized from one or more funding sources, where at least one of the one or more funding sources includes funds associated with a different currency from the target currency. The funds from the different currency are calculated at authorization to cover the transaction amount and converted at settlement or capture to determine if the transaction amount is still covered at capture.