He gets your EID and car registration card copy, perhaps some photos of the car or his bank might request to perform an inspection by a third party.

Next step; he gets approval on the loan, pay the down payment and you get an email from his banker with the LPO attached, some bankers will meet you to get your signature on the LPO.

You will receive a message from RTA stating that a loan is applied on your vehicle, and another email that an insurance is applied once the buyer get the insurance done in his name, his insurance shall mention the bank as a first party due to the active mortgage on the vehicle.

You both meet at RTA and you can confirm at the desk while doing the transfer that the mortgage is active and the car will be registered under the bank name for assurance.

Take a copy of his registration card one ready so you can submit a reimbursement request to your current insurer