Pretty nifty, i never knew this existed at all....

1)
There is the option via an email sent on the day of check out


2) There is also the option via the TV

All digital, bypassing the need to checkout in person.
Timing from OMAAT: https://onemileatatime.com/insights/check-out-hotel/


The hotel invoice is built up in the case of prepaid rate:

Deposit transfer at check in = credits
Package rate = charge
State occupancy tax = charge
Harris County occupancy tax = charge
Houston occupancy tax = charge
Destination fee = charge
Misc other adj = $20 ambassador credit