This is how to proceed on a Contract Deal.

STEP 1

First both parties should make a Deal/Rules for the Transaction
After Seller will write a contract on a piece of paper.
(The Contract Layout will be provided by the Middleman)

STEP 2

Provide 2 Clear Copy of Identification Card
(Prefered: Government ID)

STEP 3

Take a Selfie/Picture of you while holding the Contract Paper & 2 Identification Card

STEP 4

If you've done all the steps above
Proceed to give all the Pictures/Documents you have taken above to the Middleman through Private Message
(Note: Only the Middleman can hold those private details, for Seller's privacy purposes)