When payment is received, post as usual.

If necessary, use the Exchange Rates subtask on the Manage Cash Receipts screen to select the currency received. The currency must exist on the Manage Currencies screen and the from/to relationships must exist in the Manage Exchange Rate Groups screen.

After posting cash receipts, run the Compute/Post Unrealized Gains/Losses process. Since this process includes all multicurrency transactions, run it only after you have completed all accounts payable, purchase order, billing, and accounts receivables transactions for the fiscal period.