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Rule 114.Oaths and Affirmations; Written Certification; and Unsworn Foreign Declarations

Part I. General Administration · Last amended July 1, 2021 · Last verified September 4, 2026

In one sentenceRule 114 accepts an affirmation in place of an oath, treats a written certification under Idaho Code Title 9 as an affidavit, and sends unsworn foreign declarations to the civil rules.

Full Text of Rule 114

Text sizeJump to: (a) (b) (c)

(a) Affirmations in Lieu of Oath. When these rules require an oath, a solemn affirmation suffices.
(b) Declarations. Whenever these rules require or permit a written declaration to be made under oath or affirmation, such statement may be made as provided in Idaho Code, Title 9. An affidavit includes a written certification or declaration made as provided in Idaho Code, Title 9.
(c) Unsworn Foreign Declarations. Unsworn foreign declarations are governed by Idaho’s implementation of the Uniform Unsworn Foreign Declarations Act as set forth in Idaho Rule of Civil Procedure (I.R.C.P.) 2.8.
End

Rule History

(Adopted March 29, 2021, effective July 1, 2021.)

Plain-English Summary

Rule 114 is three sentences of plumbing that decide whether a document counts as sworn.

Affirmation for oath

Where these rules require an oath, a solemn affirmation suffices. No explanation is needed and no distinction follows from the choice.

Certification for affidavit

Wherever these rules require or permit a written declaration under oath or affirmation, the statement may be made as provided in Idaho Code, Title 9 — and, the rule adds, an affidavit includes a written certification or declaration made that way.

That second sentence does real work across the ruleset. Rule 105 wants an affidavit for a venue motion, Rule 109(b)(2) for disqualification for cause, Rule 401 for mandatory disclosure, Rule 507 for summary judgment. In each, an unnotarized certification under penalty of perjury satisfies the requirement.

Declarations from outside the country

Unsworn foreign declarations are governed by Idaho's implementation of the Uniform Unsworn Foreign Declarations Act, set out in Idaho Rule of Civil Procedure 2.8. It is one of the handful of places where Rule 102(a)'s switch is thrown and a civil rule is expressly incorporated.

Frequently Asked Questions

Can I affirm instead of swearing an oath?

Yes. Rule 114(a) provides that when these rules require an oath, a solemn affirmation suffices.

Does an affidavit have to be notarized?

Rule 114(b) allows a written declaration under oath or affirmation to be made as provided in Idaho Code, Title 9, and provides that an affidavit includes a written certification or declaration made that way.

What about a declaration signed outside the United States?

Rule 114(c) provides that unsworn foreign declarations are governed by Idaho's implementation of the Uniform Unsworn Foreign Declarations Act as set forth in Idaho Rule of Civil Procedure 2.8.

Where else do these rules require an affidavit?

Among others, Rule 105(a) for a change of venue, Rule 109(b)(2) for disqualification for cause, Rule 401 for mandatory disclosure, and Rule 507 for summary judgment.

Source & verification. Rule text and Rule History reproduced verbatim from the Idaho Rules of Family Law Procedure as published by the Idaho Supreme Court, current through amendments effective July 1, 2026. Promulgated by the Supreme Court of Idaho (Idaho Const. art. V, sec. 25). Last verified September 4, 2026. · Official text
Also known as: oathaffirmationaffidavitdeclarationwritten certificationunsworn foreign declarationnotarizationpenalty of perjury