It was frustrating to redeem the voucher. I had bought one for a friend, sent it to her, and she arrived at the place an hour before I did. Unfortunately, the staff would not allow her to enter without looking at my traveloka account (app). I don't have the app on my phone, so when I arrived an hour later, needed to put my account in her phone.
It would have been nice if they could have just scanned the QR code from the documents that traveloka sent. (Our names/IDs matched the documents)