(4) In any proceedings in which a Court has power to make an attachment of earnings order, and in any proceedings for the making, variation or discharge of such an order, a document purporting to be a statement given to the Court in compliance with an order under subsection (1)(a) or (b), or with any such requirement of a summons or notice of application for an attachment of earnings order as is mentioned in subsection (3), is in the absence of evidence to the contrary, deemed to be a statement so given and is proof of the facts stated therein.