Amendments are where the original numbers stop being true
Every booking starts with a quoted cost and a quoted price. Amendments — a date change, an added night, a room category upgrade — are exactly the moments where those original numbers stop being accurate, and if the amendment isn't tracked as carefully as the original booking, the price and cost quietly drift apart without anyone noticing.
Why this is worse than it sounds
A single missed amendment fee is trivial. The problem is volume: an agency processing hundreds of bookings a month will also process dozens of amendments, and if even a fraction of those aren't re-costed and re-invoiced correctly, the cumulative margin loss over a quarter can be substantial — and it's almost invisible in normal reporting, because each individual amendment looks too small to investigate.
What tracking amendments properly requires
An amendment needs to update the same connected record as the original booking — supplier cost, customer price, and invoice all adjusting together — rather than being handled as a side note in an email thread that never makes it back into the books.
How Muhasib handles amendments
Because a booking's supplier cost, customer invoice, and payment status live on one connected record in Muhasib, amendments update all three together — closing the gap where quietly outdated numbers would otherwise sit uncorrected.