Safeguarding Seller Of Property When Payment Is To Be Made Later

The buyer wants to take a loan to buy property P from Seller, but to get the loan Buyer needs to put property P as security. So, Buyer offers to Seller, that Seller does a registry of the property P in favour of Buyer and then the bank would disburse the loan amount directly to Seller. I am Seller, and I want to know how I can protect myself from fraud. That is, if the buyer fails to get a loan, or refuses to pay after getting the loan, how can I make sure that I get the property back or cancel the sale of the property. The seller is indebted and needs to sell the property. The buyer needs to get ownership first so that he can take a loan on it and pay for it then.