Credit & Debit Notes
Correct errors with a full audit trail.
Mistakes happen — a wrong price, a returned product, an agreed discount applied late. Credit notes and debit notes are the legal way to correct invoices after they have been issued. Invoify makes this easy: create a credit note that references the original invoice, and the VAT adjusts automatically. Issue a debit note for additional charges. Every adjustment creates a traceable audit record that satisfies HMRC requirements.
Why your business needs this
Legal corrections
Credit notes and debit notes are the HMRC-approved way to adjust issued invoices. Never void or edit a finalised invoice — correct it properly.
Automatic VAT adjustment
When you issue a credit note, the VAT amount adjusts automatically based on the original tax rates. No manual recalculation needed.
Complete audit trail
Every credit note references the original invoice. Every debit note is linked. HMRC auditors can trace the full history of adjustments.
Reason tracking
Select a reason for each credit note — overcharge, goods returned, discount applied, or other. Structured reasons improve record-keeping.
Step by step
Identify the error
You discover an overcharge, a return, or an additional charge is needed on a previously issued invoice.
Create the adjustment
From the invoice detail page or the editor, create a credit note (for refunds/reductions) or debit note (for additional charges).
Reference the original
The credit/debit note automatically references the original invoice number. Select a reason from the dropdown.
VAT adjusts automatically
The system calculates the VAT adjustment based on the original tax rates. Issue the note and the audit trail is complete.
Everything included
Credit notes
Reduce the amount owed — use for overcharges, returns, or agreed discounts.
Debit notes
Increase the amount owed — use for undercharges or additional agreed services.
Source invoice reference
Every adjustment links to the original invoice for a complete trail.
Automatic VAT recalculation
Tax amounts adjust based on the original invoice's rates — no manual maths.
Reason selector
Choose from structured reasons: overcharge, return, discount, error, or custom.
Separate numbering
Credit and debit notes use their own numbering sequences (CN-, DN-).
HMRC audit readiness
Improperly corrected invoices are a common trigger for HMRC inquiries. Formal credit and debit notes with linked references and automatic VAT adjustments demonstrate professional financial management and satisfy auditor requirements.
Configuration Tips
- 1Never edit an issued invoice directly — always issue a credit note to correct it.
- 2Set up separate numbering schemes for credit notes (CN-) and debit notes (DN-) in Invoice Numbering.
- 3Include a clear reason on every credit note — it protects you in the event of an HMRC inquiry.