Deed of Sale The first document that you need to produce is a deed of sale. Make sure that you get this prepared before you buy the used car with the owner whose name appears on the OR/CR. Both parties must sign this document and it will be addressed to you and lay out the foundations of the sale and serve as the legal document for the transaction. Photocopies of IDs and signatures Apart from that, you need to have proof of identity with you. That means that you have to have at least three different IDs, preferably a government-issued document. Have three photocopies of these from the seller and then also have them sign it as it will be needed for the transfer process and clearance process.