Casinos report/track your gains, not your losses. You fill out a form with your losses pretty much on the honor system. You can lose quite a bit at the casinos.
HAHAHA!!
Really?
Sorry that made me LOL!!
Losses on your income tax, I assume?
Casinos report gains over set amounts to the IRS.
However, they track both gains and losses, and especially the amount gambled. That’s how they know how much to “comp” their players. I get a free buffet, or maybe a free weekday night, at the level I play at. Others get comped room, meals, and shows on any day of the week. The high-rollers get comped a 1000 sq ft suite, haute cuisine restaurants, shows, air tickets, “free” credit at the shops, and limo transfers.
Keeping track of a slot player’s activity is trivial since slot machines are all computerized. The casinos’ ability to track the activity of a craps table or blackjack player is uncanny in my experience.