Numbering

How invoices, estimates, credit notes and payments are numbered — the prefix, the next number, and the padding.

When you would use this: your firm has its own numbering convention already (a prefix from a previous system, a particular starting point) and you need the product to carry it on rather than starting over.

How it works: each document kind counts on its own sequence. The next number can be moved forward — useful when matching an existing convention — but never back, and a document keeps the number it was issued with even if the sequence is changed afterwards. Numbers are never reused, including one that belonged to a document since deleted, so a gap in the sequence is expected and not a fault.

A narrower view: seeing the sequences needs only the ability to read settings; changing the next number or the prefix needs the further capability to write them.

When it refuses: "You cannot manage numbering" means you can see the current sequences but not change them — ask an Owner or Admin.