Invoice Disputes: What To Do When Your Customer Doesn’t Agree
You send a correct invoice. A few days later you get an email back: “I don’t agree with this.” No payment, and now a problem on top.
It’s more than an inconvenience. It feels like a block on money you’ve already earned. But a dispute isn’t a verdict. It’s a starting point. What you do in the first few days decides whether this becomes a quick formality or a drawn-out file that drags on for months.
What does it mean when a customer disputes your invoice?
An invoice dispute means your customer tells you, in writing or verbally, that they disagree with (part of) the invoice: the amount, the service delivered, or the terms. Once that happens, the invoice is no longer “undisputed”. Its status changes, and that affects how you’re allowed to collect it.
More than 40% of Belgian businesses deal with late payments. Some of that hides behind a dispute. Sometimes justified, often just a stalling tactic.
Formal objection or informal dispute: is there a difference?
In practice, people use these terms loosely. Legally, a formal, timely, written objection is the stricter standard, usually within a period set out in your terms and conditions. A dispute is broader: any form of disagreement, even a phone call or a stray email.
That distinction isn’t theoretical. A late or unmotivated objection often doesn’t count as valid. Your invoice then remains undisputed after all.
What do you do when a customer disputes the invoice? 4 steps
- Respond within 3 days. The 3-day check applies here too: the faster you respond, the smaller the chance the dispute grows into a matter of principle. Silence gets read by your customer as “no pushback.”
- Ask for the dispute in writing. A verbal complaint is fleeting. Ask your customer to confirm their objection in writing. That forces them to get specific, and gives you a paper trail.
- Check the dispute against your own file. Does the delivery match, the quantity, the agreements? An invoice that’s complete and correctly drawn up settles most disputes without discussion.
- Decide: justified, partly justified, or not justified. Each of the three calls for a different approach. Which is exactly the next point.
Is the dispute justified? A checklist
A justified dispute gets resolved with a credit note or an adjustment. Quickly and without friction, because that builds trust for the next invoice.
A partly justified dispute needs a middle ground: adjust the amount where needed, and reconfirm the rest in writing.
An unjustified dispute is where it gets sharp. This is where the Sergeant method applies: clear, consistent, no detours. “Sorry, I never got your email” is the excuse you’ll hear most. It doesn’t hold up if you’re using registered mail or a read receipt.
When does a dispute become a stalling tactic?
Some customers don’t dispute because they have a point, but because it buys time. Warning signs: the dispute only comes after a reminder, it’s vague instead of specific, or the argument keeps shifting.
In that case, bringing in an external partner is already a signal on its own. Debtors give priority to the creditor who stays consistent. Mentioning an external party makes it immediately clear that stalling is no longer an option.
When should you bring in Bizzon?
Once a dispute costs you more of your own time than the amount is worth, it’s no longer a side task. Bizzon takes over the follow-up: from the first response to escalation as leverage. So you don’t have to put your customer relationship on the line yourself.
Target result: payment within 17 days of the invoice date, even if a dispute comes up along the way.
Frequently asked questions
Do I always need to get a dispute in writing?
Not required, but recommended. A written dispute gives you a paper trail and forces your customer into concrete arguments.
Can my customer just dispute an invoice to avoid paying?
Yes, it happens. A dispute doesn’t automatically suspend payment if it isn’t timely or well-motivated. Hence the importance of a quick, correct response.
What’s the difference between a disputed and an undisputed invoice?
An undisputed invoice can be collected faster and with less discussion. Once a customer disputes it, the process changes, and an external partner is often faster than negotiating it yourself.