This article covers writing off a purchase invoice within the Purchase Ledger - for example when a supplier debt becomes uncollectable and needs clearing as bad debt. Writing off is sometimes called voiding, cancelling or clearing an unpaid invoice. For a purchase order, see 'How to write off a purchase order'. For a sales invoice, see 'How to write off a sales invoice'.
Writing off a purchase invoice in the Purchase Ledger
To write off a purchase invoice:
- Open the purchase invoice you want to write off
- Select the three dots (⋮) menu at the top of the invoice, or the standalone 'Write off' button if shown
- Select 'Write off'.
Selecting 'Write off' opens a new invoice with the invoice type set to 'Purchase: Write off', pre-filled with the same supplier, period and line details as the original purchase invoice.

Completing the write-off invoice
Before submitting the write-off invoice, amend the transaction lines so the account is your write-off (bad debt) account – for example '14355: Write off - Bad debt'. This step in the Purchase Ledger is what actually clears the debt to the correct nominal account, rather than simply cancelling the invoice. .
- For a full write-off, leave the amount as shown
- For a partial write-off, amend the amount on the line to the value you're writing off.
Once the account and amount are correct, select 'Submit' or 'Create as draft'.
Once posted:
- The original purchase invoice is marked 'Written off'
- The new write-off invoice shows a 'Posted write off' stamp.



If 'Write off' is missing or opens blank
- If 'Write off' does not appear at all, the conversion between the purchase invoice and the 'Purchase: Write off' document type has not been set up
- If 'Write off' opens an empty pop-up with no invoice detail, the document type has not been unlocked and assigned a document series.
Both are administrator tasks – see 'Setting up purchase write off document types' to resolve either issue.


Write off purchase invoice
Purchase write off
Cancel purchase invoice
Void purchase invoice
Partial write off
Blank write off pop up
Write off missing