As soon as possible, preferably before you sign an Agreement of Purchase and Sale. A Lawyer can examine the Agreement of Purchase and Sale, and may be able to suggest clauses or conditions to protect you. If you have already entered into an Agreement of Purchase and Sale, the Lawyer can review it, to ensure that you are aware of your rights and obligations, and that all conditions specified in the Contract are carried out before the sale is final. A Lawyer will also assist with the registration of the transfer (and other related items) for your closing.