A single status affidavit is a legal document used to declare that an individual is not married. It is usually required when applying for a visa or a passport.
The affidavit is required when applying for a visa or a passport because many countries require proof that the applicant is not married before they can issue the document.
The single status affidavit must be signed in front of a notary public or a lawyer, and it must be legally recorded and certified.
If the single status affidavit needs to be used outside the US it must bear an apostille or a legalization.