Invoice is not paid because of alleged duplicate billing: how to reconcile postings

Dealing with unpaid invoices does not begin with the reminder letter but with a clean starting position. The centre of attention here: How to reconcile postings. The more clearly the facts, the amount and the due date are documented, the less room a debtor has to delay. A short note in the system replaces any later reconstruction from memory.

A uniform starting point for every case helps: same checks, same order, same filing. That makes processing predictable and the results comparable. When an invoice stays unpaid, proof of delivery and of the invoice content is the first point to be checked. The effort is one-off; the benefit repeats with every case.

Evidence is the currency in any dispute. What is needed: the contract or order confirmation, the invoice with number and date, proof of delivery or acceptance, the correspondence on the case and a statement of all payments received so far. In practice, reliability pays off faster than pressure.

Correct master data matters just as much: full company name, legal form, register number and a deliverable address. Even small discrepancies lead to queries later, or to a payment order that cannot be served. Unpaid invoices often have a formal cause: a missing purchase order number, the wrong recipient or an unclear description of services. In concrete terms this comes back to one point: How to reconcile postings.

A reliable approach follows fixed stages rather than instinct. First the payment status is checked, then a factual payment reminder follows, then a formal reminder with an unambiguous final deadline. If payment still fails to arrive, the court dunning procedure or a handover to a collection agency are the options. Small improvements here work through the entire receivables portfolio.

Switching channel helps: what fails by email is often resolved in a few minutes by phone. The result of the call is then confirmed in writing. The more precisely an invoice describes the service delivered, the harder it is to delay payment with follow-up questions. What is prepared properly at this stage shortens every subsequent step.

The most common mistake is waiting. Reacting only after months costs information, contacts and, in an insolvency, part of the dividend. Equally critical are vague deadlines such as "immediately", missing proof that the invoice was received, and reminders without an itemised breakdown. Settling this point once removes the need to renegotiate it in every individual case later.

Patchy documentation is another risk. If nobody can prove when which reminder was sent, enforcement becomes unnecessarily laborious in a dispute. A brief confirmation of receipt from the customer saves a great deal of later discussion. Translated into practice this means: How to reconcile postings.

Not every case belongs outside the company immediately. Handover is sensible when deadlines and contact attempts are exhausted, the amount justifies the effort and the documents are complete. Fortis Inkasso operates as a registered collection service provider. What counts is less the perfect solution than one that is actually applied day to day.

A handover requires the invoice, the contractual basis, proof of performance, the reminder history and current debtor data. The more complete the package, the faster processing starts. For recurring services, a consistent invoice structure prevents queries from arising in the first place. That keeps the case understandable for colleagues with no prior knowledge of it.