Record the condition for release
For a hall deposit, write the event date, amount, payer, return method, and what has to happen before it is released. A room inspection and return of a key may both matter. Read the venue's actual agreement and keep the relevant handover records; different bookings can have different conditions.
Allow for more than one contributor
Suppose Jo supplied $60 and Hal $40 toward a $100 deposit. Record their contributions even if the hall returns all funds to Jo's card. A full $100 return can then be divided $60 and $40. If only $80 returns, first establish why $20 is missing before deciding who bears it.
Close collection and distribution separately
When only part comes back, record the amount received and ask for the reason for the difference. If several adults contributed, use their actual contributions to decide how to return the money. Keep the original deposit visible until every part has an outcome.
The hall's payment completes its side of the return. It does not automatically settle the contributors. Mark when the holder has returned or credited the individual shares. If an item remains disputed, leave that amount open rather than treating every contributor as fully repaid on the day a partial deposit arrives.