If you're selling your flat and have received token money, the buyer will likely want to prepare a sale agreement. You'll need to provide several documents, such as maintenance receipts, a No Objection Certificate (NOC) from your society, and identity proofs for your family members. The buyer will also require a complete chain of title documents, including the conveyance or sale deed in your name, share certificate, and possession letters. It's advisable to consult a local lawyer, especially if no property dealer is involved, to ensure all legalities are handled correctly and the sale deed is executed smoothly after obtaining the NOC.