Originally Posted by kaizen7

I believe its just common in Indonesia as I have to check out in person for my stays at Indonesian hotels.
The FD claims that they can't process the payment if the credit card not present. Although I believe they just want to play safe and prevent chargebacks and fraud.

If OP willing to take risk, he might book the entire 16 nights required and then inform the FD that he need to leave early, finalise all the charges including the future one so you could check out using the apps, and ask the FD to apply credit for all the nights.
It might works or might not.

I did before when I have to depart 1 day earlier and did manage to get all the nights and points. No idea if this will works if involved 10 or more unused nights