Written by attorneys · grounded in primary & secondary sources — see below
A sworn statement or promise made to establish facts or commitments required by law. The declaration binds the speaker's conscience and supports actions such as issuing warrants, admitting testimony, or creating warranties.
Sources & Authorities
How it applies
Common Examples
6
Warrant Based on Telephonic Oath
Agent Carla Ruiz summarized her investigation by phone to Magistrate Judge Helen Carter and emailed payroll screenshots. The judge accepted the information as sworn and issued warrants for the restaurant and manager's home. The searches proceeded because the oath or affirmation supplied the required probable cause foundation.
Witness Ritual Affirmation Accepted
Maya Chen offered a brief herb-bundle gesture and soft pledge to speak truthfully before testifying in the crop-contamination trial. The judge found the ritual impressed the duty of honesty on her conscience. Maya then gave her account of the neighboring farm conditions.
Select any source to read its text and confirm it supports the definition.
Cases
Statutes
Federal Rules
Uniform Acts
Model Codes
Hornbooks
Horizon Fund's salesperson told Dawn Financial that each currency counter would detect counterfeits with 100 percent accuracy. Dawn bought the machines shortly afterward for its high-volume branches. When the machines missed counterfeits, the statement supported Dawn's express-warranty claim.
Registered Agent Designation Affirmed
MedPartners LLP listed Kent as registered agent in its State A filing. The designation affirmed that Kent had consented to serve. When Christine later attempted service in State B after the clinic closed, the lack of a fresh State B affirmation defeated jurisdiction.
Joint Affirmation Supports Divorce Finding
Both spouses stated under oath in their petition that their marriage was irretrievably broken. After a hearing the court made the required finding and entered the decree. The mutual affirmations satisfied the statutory prerequisite for dissolution.
Limited Partnership Agent Affirmation
The limited partnership filed its qualification listing a registered agent in State A. The filing affirmed the agent's consent to serve. When a later dispute arose in State B, the absence of a State B designation prevented effective service on that agent.
Common questions
Frequently Asked
5
What form must an oath or affirmation take to satisfy evidentiary rules?+
Any form that impresses the duty of truthfulness on the witness's conscience suffices. Courts accept simplified promises, ritual gestures, or culturally specific statements when the witness understands the obligation to be honest.
Supporting sources
Does a salesperson's oral statement about product performance create an express warranty?+
Yes when the statement is an affirmation of fact that becomes part of the basis of the bargain. The buyer need not prove the seller intended to create a warranty or used formal words such as "warrant."
Supporting sources
When may a magistrate rely on remote communications to issue a warrant?+
A magistrate may rely on information sent by telephone or reliable electronic means provided the information is given under oath or affirmation and properly recorded. Physical presence of the applicant is not required.
Supporting sources
What happens if one spouse denies under oath that the marriage is irretrievably broken?+
The court must consider all relevant factors including the circumstances giving rise to the petition and the prospect of reconciliation before making a finding on whether the marriage is irretrievably broken.
Supporting sources
Does designating a registered agent in one state bind the entity in another state?+
No. The designation affirms consent only for the state in which it is filed. Service on an agent designated in State A is ineffective for jurisdiction in State B absent a separate designation and consent in State B.
Supporting sources
541 U.S. 36 (2004)Evidence
…applies to “witnesses” against the accused, i.e., those who bear testimony. And the word “testimony” is a solemn declaration or affirmation made for the purpose of establishing or proving some fact. An accuser who makes a formal statement to government officers bears testimony in a sense that a person who makes a casual remark…
Criminal Law Constitutional ProtectionsConstitutional protections of accused persons · Arrest, search, and seizure [Fourth Amendment]NEXTGENFoundational