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We Overbilled a Client. We Caught It Ourselves. Here's What We Did.

They didn't notice. We did. We brought it up ourselves, issued a partial refund before they asked, and built a system so it never happens quietly again.

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Arlox Team·Jul 4, 2026·3 min read

Arlox internal delivery audit process showing monthly billing accountability check before invoices go out to D2C brand clients

We overbilled a client! Yeah. This happened. Not intentionally. But it happened and that's what matters. A brand we were working with got charged for a full month of management during a period where we were understaffed and genuinely delivered less than what we promised. Nothing catastrophic. But less than the standard we hold ourselves to.

They didn't even notice. We did. We brought it up on the next call ourselves. Gave them a partial refund before they could ask. Documented what went wrong internally and figured out exactly how it happened. They were shocked. Said no agency had ever done that before. That's actually the sad part. At Arlox we have one rule that sits above everything else - if we didn't earn it, we don't keep it.

Sounds simple. Apparently it's rare. What changed after that: we now do a monthly internal delivery audit before any invoice goes out. Someone internally checks — did we actually do what we charged for this month? If the answer is anything less than yes, the invoice gets adjusted first, conversation happens second.

No client should ever have to chase an agency for accountability. That's backwards. If you're a brand owner reading this while evaluating agencies — ask them what happens when they underdeliver. How they answer that question tells you everything about who they actually are.

— Arlox

Key Takeaways
  • Arlox caught their own overbilling mistake, issued a partial refund, and now conducts a monthly internal delivery audit before sending invoices to ensure they only charge for work fully delivered.
The Short Answer

What should an agency do when they underdeliver or overbill a client?

When Arlox overbilled a client due to understaffing, they proactively notified the client, issued a partial refund before being asked, and implemented a monthly internal delivery audit to prevent future occurrences. The agency emphasizes that if they don't earn the money, they don't keep it.

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