Ours worked fine yesterday.
But...if you don't get the RR your expecting you really need to address it right then and there.

The receipt does not show any kind of indication that a RR is due to print, that it has printed or that it did not print but should have.
If you come back 2 days later w/ product and receipt in hand there could be some doubt about whether or not you really did not receive it.
At my store...we will do everything we can to make sure that you get what your supposed to get in a timely manner, but if you come back a day or so later and then complain there really isn't much we can do.