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
Full Text of Rule 114
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.