Cancelling vs deleting an invoice

These are different on purpose.

Delete invoice

• Allowed only while the invoice is Draft
• Permanently removes the invoice
• Use when you created a draft by mistake and never sent it

Cancel invoice

• Allowed for Sent or Overdue invoices
• Sets status to Cancelled and locks the invoice
• Keeps a record that billing was voided
• Use when the client should no longer pay

Paid or refunded invoices

Core content stays locked. You generally cannot delete them; use refunds to reverse payment rather than delete. Some secondary fields (for example bank reference / evidence) may still be editable depending on the editor rules.

Choosing quickly