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Rule 64.Requests for Admission

Part VII. Disclosure and Discovery · Last amended January 1, 2019 · Last verified September 4, 2026

In one sentenceRule 64 allows up to 25 requests for admission, treats an unanswered request as admitted, and makes an admission conclusively established unless the court permits it to be withdrawn.

Full Text of Rule 64

Text sizeJump to: (a) (b)

(a) Scope and Procedure.
(1) Scope. A party may serve on any other party a written request to admit, for purposes of the pending action only, the truth of any matters within the scope of Rule 51(b) relating to:
(A) facts, the application of law to fact, or opinions about either; and
(B) the genuineness of any described documents.
(2) Form; Copy of a Document. Each request must be separately stated. A request to admit the genuineness of a document must be accompanied by a copy of the document.
(3) Number. Unless the parties agree or the court orders otherwise, a party may serve on any other party no more than 25 requests for admission.
(4) Time to Respond; Effect of Not Responding. A matter is admitted unless timely denied or objected to. The responding party must serve a response within 40 days after service, or within 40 days after being served with the request, or within 60 days after service of the summons and petition upon the respondent or execution of an acceptance of service by that respondent. A response must be signed by the party or the party's attorney. The parties may agree to, or the court may order, a shorter or longer time for responding.
(5) Response. If a request is not admitted, the response must specifically deny it or state in detail why the responding party cannot truthfully admit or deny it. A denial must fairly respond to the substance of the request; and when good faith requires that a party qualify a response or deny only part of a request, the response must specify the part admitted and qualify or deny the rest. The responding party may assert lack of knowledge or information as a reason for failing to admit or deny only if the party states that it has made reasonable inquiry and that the information it knows or can readily obtain is insufficient to enable an admission or denial.
(6) Objections. A party must state grounds for objecting to a request. A party may not object solely on the ground that the request presents a genuine issue for trial.
(7) Motion Regarding the Sufficiency of a Response or Objection. The requesting party may move to determine the sufficiency of a response or objection.
(b) Effect of an Admission. A matter admitted under this rule is conclusively established unless the court, on motion, permits the admission to be withdrawn or amended. Subject to Rule 76.1, the court may permit withdrawal or amendment if it would promote the presentation of the merits of the action and if the court is not persuaded that it would prejudice the requesting party in maintaining or defending the action on the merits. An admission under this rule is not an admission for any other purpose and cannot be used against the party in any other proceeding.
End

Rule History

Added Aug. 30, 2018, effective Jan. 1, 2019.

Plain-English Summary

Rule 64 is the narrowing tool. Its purpose is to take facts off the table before trial.

Scope and number

Within the scope of Rule 51(b), a party may ask another to admit the truth of facts, the application of law to fact, or opinions about either, and the genuineness of described documents. Each request must be separately stated, and a request about a document's genuineness must be accompanied by a copy of the document. Unless the parties agree or the court orders otherwise, no more than 25 requests may be served on any party.

Silence admits

This is the provision that catches people. A matter is admitted unless timely denied or objected to. No motion is required and no order is entered; the admission simply happens. The response is due within 40 days after service, or within 60 days after service of the summons and petition on the respondent or execution of an acceptance of service, and must be signed by the party or the party's attorney.

What a proper response looks like

A response that does not admit must specifically deny the request or state in detail why the party cannot truthfully admit or deny it. A denial must fairly respond to the substance, and where good faith requires qualification or a partial denial, the response must specify the part admitted and qualify or deny the rest.

Lack of knowledge is available only on a stated showing: that the party has made reasonable inquiry and that the information it knows or can readily obtain is insufficient to admit or deny. Grounds for objection must be stated, and a party may not object solely because the request presents a genuine issue for trial -- the whole point being to establish facts that would otherwise be tried.

Effect, and getting out

A matter admitted is conclusively established unless the court, on motion, permits withdrawal or amendment. Subject to Rule 76.1, the court may permit it if withdrawal would promote the presentation of the merits and the court is not persuaded it would prejudice the requesting party in maintaining or defending on the merits.

The last sentence is a real protection: an admission under this rule is not an admission for any other purpose and cannot be used against the party in any other proceeding.

Frequently Asked Questions

What happens if I ignore a request for admission?

It is admitted. Rule 64(a)(4) says a matter is admitted unless timely denied or objected to.

How many requests for admission can be served?

Rule 64(a)(3) allows no more than 25 on any other party, unless the parties agree or the court orders otherwise.

Can I answer that I do not know?

Only on a showing. Rule 64(a)(5) permits asserting lack of knowledge or information only if the party states that it has made reasonable inquiry and that the information it knows or can readily obtain is insufficient to enable an admission or denial.

Can I object because the request goes to a disputed issue?

No. Rule 64(a)(6) says a party may not object solely on the ground that the request presents a genuine issue for trial.

Can an admission be taken back?

Rule 64(b) makes an admitted matter conclusively established unless the court, on motion, permits withdrawal or amendment. Subject to Rule 76.1, the court may allow it if that would promote presentation of the merits and would not prejudice the requesting party.

Can an admission be used in a different case?

No. Rule 64(b) states that an admission under this rule is not an admission for any other purpose and cannot be used against the party in any other proceeding.

Source & verification. Rule text and Rule History reproduced verbatim from the Arizona Rules of Family Law Procedure as published by the Arizona Supreme Court, current through amendments effective January 1, 2026. Promulgated by the Supreme Court of Arizona (Ariz. Const. art. 6, § 5). Last verified September 4, 2026. · Official text
Also known as: requests for admission25 requestsdeemed admittedadmissionswithdrawing an admissionconclusively established