(1) A defendant who wishes to —
(a) dispute the claim; or
(b) dispute the court's jurisdiction,
must file at the court office at which the claim was issued an acknowledgment of service in Form 4 or 4A containing a notice of intention to defend.
(2) A defendant files an acknowledgment of service by completing the form of acknowledgment of service and handing it in at, or sending it by post or by electronic means, including by the Electronic Litigation Portal, to the court office.
(3) An acknowledgment of service has no effect until it is filed at the court office.
(4) A defendant need not file an acknowledgment of service if a defence is filed within the period specified in rule 9.3.
(5) A defendant may —
(a) amend an acknowledgement of service once, without leave of the court, before the expiration of the time for filing a defence and thereafter with leave of the court; or
(b) withdraw an acknowledgement of service with leave of the court.
(6) If a defendant fails to file an acknowledgement of service or a defence or withdraw an acknowledgement of service, judgment may be entered if Part 12 allows it.