Umdena that he doesn’t realize that his cc is still being charged/ headcheck is still being cashed. No one pays for nothing willingly.
Seem to recall one of The Rabbonim guidelines specifically addressed headchecks. I’ll try to find it later.
They addressed head checks being deposited by a babysitter for a month in which we already know there will be no services performed. Here we are discussing a case where neither side is certain if it will, but if the father recants permission he will forfeit his previous deposit and thus lose if camp actually opens, or he can leave it as is and let it be cashed but will be forfeiting this money as well should the camp be forced not to open.
Again, the father certainly has a right to withdraw authorization to charge his card or cancel the checks, but if he does not withdraw permission, the camp would seemingly be fully within its’ rights to cash them assuming they honestly believe they will be opening.