Just to give what I HOPE is the final report on this one, when ResKey sent out the automatic "we hope you enjoyed your stay" e-mail 3 days after they left, the girl saw at the bottom that she had a $70 balance due for damage to the paddles.
She called, apologized for her card being over its limit, and promised it would be okay to charge the card yesterday. We forgot yesterday but Linda ran it through today from ResKey and it worked! Received confirmation from Authorize.net that the daily settlement has transferred the money to our account.
Let's just hope it stays there!.