DocumentsOfficial source: Govern d'Andorra — Departament de Tributs i de Fronteres
Invoice series
The consecutive and traceable numbering sequence to which an issued invoice belongs.
Each series must remain continuous and gap-free. Separate series can be maintained for invoices and credit notes.
An example
F-2026/0184 identifies the series, financial year, and number within that series.
The typical mistake
Leaving gaps or reusing numbers when two people issue simultaneously. Numbers must be assigned transactionally.
How it appears in AndCompta
The number is assigned transactionally at issue. Even when two people issue at the same time, there are no duplicates or accidental gaps, and genuine voids remain documented.
Where we explain it in depth
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This definition is general information, not tax or accounting advice. For your specific case, consult a professional and always check the official source.