Money owed
Every balance somebody has to chase, in one panel — and a payment link that is chased until somebody knows what happened to it.
A hotel loses money in the gaps: the advance that was requested and never arrived, the company bill that nobody chased, the guest who left with ₹600 on the folio. The money-owed panel lists every one of them, says which need a person, and is reached from anywhere.
A payment is chased until it is answered
A payment link is sent; the gateway may answer in a second, in an hour, or never. The system keeps asking the gateway until the attempt is settled or expired, records every attempt, and refuses to take the same payment twice. When nothing arrives, the booking's hold lapses and the room goes back on sale.
On account
A bill transferred to a company is an invoice with a due date on the company's ledger. Receipts are allocated against named invoices, a shortfall has a name — TDS deducted, a short payment, a dispute — and the collections desk sees who is past due, who is chasing it, and what was promised.
Prepaid by an OTA
Money an OTA collected is not money the guest owes. The card says so; the panel says it is due from the OTA; the channel settlement, when it arrives, is matched booking by booking.