12. A seller is exempt from the obligation of having sworn the declaration referred to in paragraph 6 of section 31 of the Act, if he produces at the same time as that declaration:(a) a copy of the contract pursuant to which the amounts that are the subject of his request for withdrawal were deposited; and
(b) a written statement attesting that the goods and services were provided; the statement must be signed by the liquidator of the succession or the deceased person’s next of kin with whom details of the execution of the contract were settled.