Section 39

Any alteration of, or matter added to, a hire-purchase agreement or any written document that contains the terms and conditions of the agreement after the document was signed, if the alteration is an alteration of any of the matters set out in the written statement or statements required to be served on the hirer pursuant to paragraphs 4(1)(a) and (b) before the hire-purchase agreement was entered into, shall have no force or effect unless the hirer or his agent has consented to the alteration or the additional matter by signing or initialing the agreement or the written document in the margin thereof opposite the alteration or additional matter or, the hirer or his agent has consented to the alteration or the additional matter by signing an agreement supplemental to the hire-purchase agreement.