The Civil Procedure Rules 1998

[F1Acknowledgment of service and defenceE+W

57.4(1) A defendant who is served with a claim form must file an acknowledgment of service.

(2) Subject to paragraph (3), the period for filing an acknowledgment of service is—

(a)if the defendant is served with a claim form which states that particulars of claim are to follow, 28 days after service of the particulars of claim; and

(b)in any other case, 28 days after service of the claim form.

(3) If the claim form is served out of the jurisdiction under rule [F26.32 or 6.33], the period for filing an acknowledgment of service is 14 days longer than the relevant period specified in rule [F36.35] or [F4Practice Direction B supplementing Part 6].

(4) Rule 15(4) (which provides the period for filing a defence) applies as if the words “under Part 10” were omitted from rule 15.4(1)(b).]