Aha Trivia Stuff Everyone Should Know
Aha Trivia: Stuff Everyone Should Know · ahatrivia.com/mb-stamp-collecting-7c6f246536f2

What are perfins?

Perforated initials used as security markings.

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  1. Stamps used only for airmail
  2. Perforated initials used as security markings ✔
  3. Stamps with no holes

Why: Perfins are perforated initials, a kind of security marking studied in traditional philately.

Huh, didn't know that: Perfins are perforated initials, a kind of security marking studied in traditional philately.

The dad joke
Perfins are initials with a hole lot of security.
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References

Answer: Perforated initials used as security markings. Perfins are perforated initials, a kind of security marking studied in traditional philately.

  1. Philately en.wikipedia.org/wiki/Philately
    Any security markings, underprints or perforated initials ("perfins")
    Checked 2026-11-07.

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