[CQ-Contest] CFM?

[ludal@dmv.com (Dallas Carter)]

It means confirm or confirmed.  Unfortunately you often never know
whether the staion is confirming that he/she received your exchange,
or that they request you to confirm some sort of information, like your
call.  I usually try to make a determination based on context and when
in douubt, repeat what I think they need.

73  Dallas W3PP