Is there a short term for lack of a date of expiry when talking about documents? I'm specifically interested in identification document (ID).

  • 3
    Are you referring to permanent, non-expiring documents, or instead to incomplete / uncompleted forms? Apr 24, 2012 at 7:52
  • I'm referring to permanent, non-expiring documents. Apr 24, 2012 at 9:03
  • For foods, the term is "stable'. But I don't think that works with documents unless you get people to agree to your use. Apr 24, 2012 at 12:28

3 Answers 3


I would simply use the term non-expiring. For example, in Washington state, one can obtain a non-expiring license for child care.

You may also encounter the phrase valid in perpetuity, e.g. Hawaii Rev. Stat. §481B-13 (about electronic gift cards/certificates):

…if the gift certificate does not have an expiration date, it shall be valid in perpetuity.

This phrase is generally used in describing the length of effect of a legal document (like a contract or a constitution) or financial instrument rather than an identification, though, so I would consider it a secondary choice.


You could say the identification document has lifelong validity.


You could use NONEXP, meaning non-expiring.

This is a common 'symbol' used with ink stamps, printed labels, and metadata tags. Though it is not a formal English word/term, it is a very common 'symbol' used on documents for the exact purpose of the OP's question.

  • 2
    Hi Tamika, and welcome to EL&U. “Nonexp” doesn’t look like an English word. Were you aiming for a contraction of Cameron’s “non-expiring”?
    – Lawrence
    Apr 20, 2019 at 23:27
  • No, i think Tamika is referring to a common document code, which can take the form of a ink-stamp, a printed label, metadata tag, etc. Despite that this answer is so brief, I think it is good — albeit it could use some context. Apr 24, 2019 at 13:56

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