I hate to be a "devils advocate" all the time but I think a casino would be hard pressed to refuse a slabbed chip if THEY sold it as a 'gaming' chip and not as a 'cancelled souvenir'. They may replace it at the tables or request you bring it to the cage for redemption but to refuse it without the caveats I stated......they'd be risking their license if it was done to me that's for sure!