Disputes

Your customer paid invoice #5 but not invoice #3. Here's why.

A customer who is short of cash pays you late, in order — oldest bill first, because that's how credit actually works when the constraint is money. A customer who pays newer invoices while an older one sits untouched isn't short of cash at all. Something is wrong with that specific bill.

The pattern to look for

Invoice #3, raised 12 March, is still open. Invoices #4 and #5, raised 2 April and 18 April, are both settled. That order is the tell.

Reminders address forgetfulness or cash flow. This is neither — it's an unresolved complaint sitting quietly in your ageing report, usually for months.

Collection Plan flagging Verma Industries Pvt Ltd's ₹3,10,000 invoice as a likely dispute — four newer invoices from the same customer were paid while this one sat unpaid at 157 days. — This exact pattern, flagged automatically — the actual output on the analysis engine's own test ledger, not a mockup.

Why this happens

When a customer skips an old bill to pay newer ones, it's almost always one of these:

Likely cause	What it looks like
Short or damaged delivery	They received less than the invoice says, or part of the shipment was rejected, and nobody adjusted the bill.
Quality complaint	A complaint was raised — sometimes verbally, to a salesperson who never escalated it — and it was never resolved either way.
Rate or amount mismatch	The invoiced rate doesn't match the PO. Their accounts team won't pay against a mismatched document; they wait for a credit note.
Missing paperwork	No e-way bill, wrong GSTIN, or a GSTR-2B mismatch blocking their input tax credit — common, and rarely mentioned unprompted.
An old, half-forgotten adjustment	A promised discount, a returned item, or a debit note that was agreed on a call and never reflected in either set of books.

Why a reminder won't move it

A payment reminder assumes the customer agrees they owe the money and simply hasn't paid yet. A disputed invoice fails that assumption at the first word. Sending the same "kindly clear the outstanding" message you'd send a forgetful customer reads, to them, as either tone-deaf or slightly aggressive — and it still won't get paid, because paying isn't actually the blocker. The blocker is a question nobody has answered.

This is why these invoices are so often your oldest and largest outstandings. They don't respond to the normal escalation ladder, so they just sit — sometimes written off in the owner's head long before anyone officially writes them off in the books.

How to spot it in your own ageing report

You don't need special software for this, just two exports from Tally and a bit of patience:

Export Outstanding Receivables (detailed view) and Bills Cleared for the same customer, both for the last 12 months. Exact steps here if you haven't done this before.
Sort both by invoice date.
For each open invoice, check whether any invoice raised after it appears in the cleared list.
If yes — and the customer has otherwise been paying normally — that's your candidate.

Doing this by hand for one customer takes a few minutes. Doing it across sixty customers every month is the part that doesn't scale, which is the specific problem an automated ageing tool exists to solve — Collection Plan runs this exact check against every invoice in your upload and flags it automatically, but the underlying logic is simple enough to run yourself on a handful of accounts.

Keep it rare on purpose A single skipped invoice among many isn't automatically a dispute — sometimes it's just the next one in the queue. Look for a customer with an otherwise clean payment record who has specifically stepped over one bill. The rarer you keep the flag, the more it's worth reading when it fires.

What to say when you call

Don't ask for the money. Ask what's wrong.

"Hi — I noticed INV-2180 from March is still open even though you've settled the April and May invoices. Is there an issue with that one we need to sort out?"

This does two things a reminder can't: it signals you've actually looked at their account rather than sent a template, and it invites the real answer instead of another polite deflection. Most of the time the issue is small and gets resolved on that one call — a credit note, a re-sent e-way bill, a corrected rate. Occasionally it surfaces a genuine quality problem that's worth knowing about regardless of the money.

Once it's resolved

Fix the root cause in Tally — issue the credit note, correct the invoice, resend the missing document — rather than just noting "customer says it's fine" and moving on. If the same mismatch keeps recurring with the same customer, that's a process problem on your side worth fixing once, not a collections problem to keep rediscovering every quarter.

Free: find the disputes hiding in your own ageing report

Upload your Tally outstanding report. We check every invoice against that customer's own payment order and flag the ones that look stuck in a dispute — no signup, nothing stored.

Run a free health check

Next: How to reduce DSO · Reminder message formats · GSTR-2B mismatch · E-way bill disputes · Legal options against a defaulter · Bad debts: law and tax treatment