Walk-in agent

A walk-in agent is an individual who voluntarily offers to conduct espionage. Specifically, a "walk-in" is an agent or a mole of a government who literally walks into an embassy or intelligence agency without prior contact or recruitment.

References

Polmar, Norman (1996). Spy Book, The Encyclopedia of Espionage. Random House. ISBN 978-0-679-42514-4. {{cite book}}: Unknown parameter |coauthors= ignored (|author= suggested) (help); Unknown parameter |month= ignored (help)