After final payment, if the purchaser moves out of the State and upon written notice to the seller and to the trustee, the purchaser may cancel any such contract for the furnishing of personal property or services prior to performance by seller and to the death of the person for whose benefit such contract was made, in which event the purchaser shall be entitled to receive from the trustee the principal amount of money on deposit to the credit of that particular contract less the interest which shall be returned to the seller.