Doorbook.
The monthly round

Getting paid

Every finished bill carries a QR code the tenant scans in their own banking app. There is nothing for them to install and no account for them to have.

4 min read Updated 2026-08-13
FROM BILL TO BANK Bill is ready QR carries the exactamount Tenant scans it intheir banking app You mark theroom paid Doorbook never touches the money. It draws a code your bank already understands.
The tenant's side of this needs no app, no account and no explanation.

The four ways to be paid

MethodWhereWhat you enterAmount in the code
PromptPayThailandYour registered mobile numberYes
VietQR / NAPAS 247VietnamYour bank's BIN and your account numberYes
KHQR / BakongCambodiaYour Bakong account and nameYes
Your own QRAnywhereA photograph of your bank or wallet QRNo — the tenant types it

Where the standard supports it, Doorbook writes the exact amount due into the code, so the tenant cannot mistype it and you are not reconciling odd amounts at the end of the month. Where it does not, the total is shown large beside the code.

Sending the bill

A finished bill can be sent to the tenant through whichever messenger they actually use: LINE, WhatsApp, WeChat, KakaoTalk, Zalo or Telegram. Doorbook suggests the one that matches your language and lets you set a different one per room, because one building is rarely all on the same app.

Cash

Plenty of rent is still handed over in notes. Mark the room paid and the ledger treats it identically — the QR is an option on the bill, not a requirement of it.

What Doorbook does not do

  • It does not connect to your bank, and it never sees a transaction.
  • It does not move money, hold money or take a percentage.
  • It cannot tell you a payment has arrived. You mark the room paid when you see it in your own bank app.

Read next