The principle
Invoices should follow a clear sequence. Avoid deleting issued invoices or creating manual gaps that are difficult to justify later.
Good practices
- Use one sequence per document type when needed.
- Keep cancelled documents traceable.
- Do not edit numbers manually after issuance.
- Archive PDFs and payment history together.
How LeCRM helps
LeCRM automates numbering and keeps each invoice attached to the customer, payment and audit history.