# Sample support answer: can I change an invoice after sending it?

A fictional result of the Answer a customer question recipe: a reply ready to send, the source behind each claim, and internal notes kept separate.

> [!info]
> **Fictional example.** Tally and its help notes are invented. This shows the shape of what the *Answer a customer question* recipe drafts. Nothing was sent.

## Reply, ready to send

> [!quote]
> Yes, until your client pays anything. Open the invoice, choose **Edit**, make your change and send it again. Your client gets the new version, and the old link shows the new one too.
>
> Once a payment has come in, the invoice is locked so the record stays straight. To change it then, issue a credit note for the difference and a new invoice; Tally links all three.

## Sources

| Claim | Source |
| --- | --- |
| Unpaid invoices can be edited and re-sent | Product notes · Invoices · Editing |
| The old link shows the new version | Engineering · Decision: one link per invoice |
| Paid invoices are locked | Product notes · Invoices · Locking |
| Credit notes are linked to both invoices | Help article · Credit notes |

## Internal notes

- Third question about this in a week. Worth a help article with a short video.
- Part payments count as a payment, so a part-paid invoice is locked too. Not mentioned in the reply to keep it short; add it if they ask.