Yes. In NSW a residential property cannot be put on the market until a contract of sale has been drawn up. If you are interested in a property, ask for a copy of the contract as soon as possible. Get your lawyer or conveyancer to review the contract and ensure it aligns with your understanding. If you wish to change any part of the contract, your lawyer or conveyancer can do this on your behalf. The seller must then agree to requested changes before contracts are exchanged.