How to handle expenses someone forgot to log
It's three weeks after the trip. Someone just remembered they paid €120 for the rental car. Now what?
Late expenses are a normal part of group trips - receipts get lost in pockets, statements take time to land, and the 'I'll log it tomorrow' syndrome is real. The mistake is to either (a) refuse to add late expenses out of principle or (b) add them and act like nothing happened. The right answer is to add them with a transparency timestamp and re-run Settle Up.
Steps
Worked example
Late €120 rental-car expense across 4 people
Original Settle Up: Anna pays Diego €85, Eva pays Diego €85, Faisal pays Diego €125. Late expense: Faisal paid €120 for the rental. New balances mean Faisal is owed €30 net. Eva and Anna each Wise €15 to Faisal; Diego owes nothing additional.
Late expenses are normal. The system handles them - the social contract is what matters. Be transparent about the delay and the group will accept it.