Visited a lawyer friend in Hong Kong (pre takeover) where client entertaining frequently required visits to hostelries of ill repute - all claimable and signed

Visited a lawyer friend in Hong Kong (pre takeover) where client entertaining frequently required visits to hostelries of ill repute - all claimable and signed off. Knew someone who sold his company and agreed to stay on for X months handover period. The new owners tried to go back and prove from previous expense claims that fraudulent activity had occurred and that they shouldn't pay some amount previously agreed. You need to be careful. A long time ago, a project manager was paid 3X per month for a flat in Germany because at their level that was what they were entitled to. Then new junior person on same project came in, and happened to take over same flat and claimed X (with receipts). At the time this was just ignored - different folks different rules.