Issue a debit note to record an additional amount owed - for undercharges or extra costs.
A debit note works in the opposite direction to a credit note: it's issued when an amount owed needs to increase after the original invoice, typically because an item was undercharged, additional goods or services were provided, or an agreed cost adjustment - like a freight surcharge - needs to be added afterwards. Buyers also sometimes issue debit notes to a vendor to formally record a claim, such as a shortage on a received shipment, before it's resolved through a corrected invoice or credit note from the seller.
This generator mirrors the credit note's structure but in reverse: you reference the original invoice, specify the additional line items or charges being added, and the running total shows exactly how much extra is now due. A reason field again captures why the adjustment is being made, which is important context for whoever on the other side needs to approve or query the additional charge before paying it.
Because debit notes often relate to a dispute or a genuine oversight on the original invoice, being precise and specific in the line items - rather than a single vague 'additional charges' line - makes the document far easier for the receiving party to verify and accept quickly. Clear documentation at this stage also reduces the chance of the same discrepancy being re-argued later during a broader account reconciliation.
As with the rest of the toolkit, this tool runs entirely in your browser, so none of your pricing adjustments, client details or dispute reasons are ever transmitted to a server. Once the debit note is complete, print it for internal filing or download it as an HTML file to send to the other party alongside any supporting explanation, keeping the adjustment clearly documented from the moment it's raised.
Just as with credit notes, keeping debit notes in their own clearly numbered sequence separate from regular invoices makes account reconciliation considerably easier for both your own team and whoever is reviewing the adjustment on the other side. It's also worth flagging clearly to the recipient, outside of the document itself, that a debit note has been issued and why, since these documents are sometimes overlooked if they arrive without any accompanying explanation. A consistent, well-documented approach to debit notes reduces the friction of what can otherwise become a drawn-out dispute over a relatively small additional charge that could have been resolved quickly with clear paperwork from the outset.
A predictable, well-documented approach to raising debit notes, applied consistently every time rather than only for larger amounts, also sets a clear expectation with regular vendors and clients about how your business handles post-invoice adjustments generally.
Finally, businesses that communicate these adjustments clearly and promptly, with full supporting detail, generally find them accepted and settled far more quickly than those that raise a bare figure without adequate explanation attached.
In short, and a considered, professional tone throughout that document tends to keep the underlying business relationship on good footing even while a specific charge is being formally disputed or clarified between the two sides.
An invoice is the original bill for a sale; a debit note is issued afterwards to add an amount not captured on that original invoice, such as an undercharge or extra cost.
Yes, buyers commonly issue debit notes to record a claim against a vendor - for a shortage, damage, or overcharge - pending a corrected invoice or credit note in response.
Yes, this makes it clear exactly which transaction the additional amount relates to, which is essential for both sides' accounts teams to reconcile correctly.
Yes, everything is generated locally in your browser and never sent to or stored on a server.