MT799
Buyer confirms Soft Offer and issues an official ICPO and MT799 for total value of contract.
Then Seller confirm ICPO & MT799.
MT799 is a simple text message, sent bank to bank. This is used for a bank to bank proof of funds, only. The MT799 is not a form of payment and it is not a bank undertaking or promise to pay. It is simply a bank to bank confirmation of the funds on deposit, nothing more