Ransom event : only once or more possible ?

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Hi !
I'm playing a colony which is running smoothly, except for an accidental pirate abduction of a pawn I would REALLY like to get off the planet (others I don't care so much for). I received a ransom demand but could not afford the silver at the time (I really tried but couldn't, and OF COURSE Cassandra dropped a silver meteorite on me the day after it was due to spite me).

Anyway, I wanted to know whether pirates might ask for a ransom a second time for the same prisoner or if this is really the end for this pawn (in which case I would leave the planet without him). I asked on Steam but the answer was inconclusive.
Thanks !