No, you do not have any rights to the money you must be paid for the work you do, at your rate, and given the actual tips you earn, but an accounting, software, or administrative error does not create any entitlement to money. If you do not return the excess funds, they could in theory sue you for it, though that is hardly likely to be economically worthwhile--still they do have that right. They could also fire you "for cause," so you do not receive unemployment, even if you would otherwise be eligible for it.