Udhaar khata that adds up: customer credit, advances and what you owe suppliers

Yes. As it comes, a bill that would take a customer over their credit limit is refused, and a customer with no limit pays at the counter. In Settings › Payments › Khata you can instead have the cashier warned and confirm, or ask for a manager's PIN for that one bill, and set the same rule for a customer whose oldest unpaid bill is older than the days you choose. Each bill keeps how it was let through and by whom.

Yes. Each unit of an item has a retail and a wholesale price, and a customer can be set to wholesale prices. A named, dated price list can also give a group of customers their own prices, or a discount off a brand or a category.

Yes. Import customers and suppliers from a CSV file with their opening balances, dated with your closing day, so each statement starts from the right figure.

Open the customer's khata, choose the period and save the statement as a PDF, then send it yourself by WhatsApp or email, or print it on A4 or the receipt printer. The ageing report shows who has owed you longest, so you know whom to call first.

Yes. An advance is taken in cash, bank, card or wallet and held for that customer as money you owe them, not as a sale. Later bills can be paid "From advance", alone or with cash, and what is left can be refunded.

It removes the usual arguments. In MartPOS every bill on khata and every payment has a number and a date, the balance is worked out, not added by hand, and a bill over the customer's limit is stopped at the counter unless your rules let it through. A statement answers "I paid you last week" in seconds.