Invoices and Bills - Lock once finalised
Locking Invoices and Bills so they cannot be deleted once Finalised.
We often see clients raise invoices, or bills in their Xero file, and then later delete them if a change is required, and then raise another invoice or bill.
From an accounting perspective, this is a huge sin.
Once an invoice or bill has been finalised, the only way it should be altered is by raising either a debit or credit note against it. Xero allows a user to raise debit or credit notes, but the average non-accountant does not understand what these are, so they do the easiest thing and simply delete, and start again.
It would be a lot better if once an invoice or bill has been finialsed, it was locked so could not be deleted from the system.