Automatic document numbering: why it matters and how it works
The number on a document is not decoration. It is your key to finding it later and your proof that the organization issued so many documents in a period and that none left without a trace.
What a good number looks like
A format such as INV-2026-0001 combines three things: the document type, the year, and a sequence that restarts each year. You read the number and know what it is and when it was issued.
Rules that are never broken
- No repeats: the number is generated from one central counter, not from each device separately, so two employees never issue the same number.
- No deletion: a wrong document is cancelled and its number stays visible with the status "cancelled"; the number is never reused.
- No unexplained gaps: any missing number must have a recorded reason.
- A sequence per type: quotes have a counter and receipts have another.
Tax invoices
If you are registered for VAT, tax invoices must carry sequential, unique numbers and may be audited. That is why automatic numbering is simpler and safer than writing numbers by hand.
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