What is the ruling on a customer leaving money and departing before the completion of the transfer procedures for a remittance, knowing that the cash equivalent is present but the sending of the remittance is sometimes delayed?

If the exchange takes place in the contract session, meaning the customer pays the currency to be exchanged and receives a voucher enabling him to withdraw the amount, then the exchange is valid. There is no problem with the customer leaving immediately after the purchase, nor with the delay in the arrival of the transfer.