The contract should use the same review standard for both sides. Identify owners, exchange property, encumbrance status, cash equalisation and registration documents so that the two properties cannot be confused.
Before signing, review current land-register extracts and the declarations required for registration. The purchase contract review should also check that cash equalisation, maturity and escrow release fit the agreed registration sequence.
If one side falls behind, the contract needs a clear response. Depending on its wording, this may involve retaining documents, setting a grace period, reversing the transaction or another expressly agreed consequence. The suitable solution depends on the contract and the stage of completion.