Expenses misery
A hotel I stayed at once charged my corporate card a sum to cover the bill for damage to a room that I had allegedly caused. It was refunded after an angry complaint to the manager.......and that was were the trouble really started. The AI expenses system assumed that the company was owed this refund, and started to deduct it from future claims.
In the end, the only way to make this refund disappear was to NOT CLAIM a NEGATIVE amount for the item!
The same AI expense system once recorded a photo of a McDonalds receipt as a flight somewhere!
Often it took longer to confirm that the AI had correctly assigned everything than it ever did filling in the old paper system, photocopied receipts etc.