--- title: "FAQ" slug: "raison-sociale-faq" updated: 2025-10-03T06:59:43Z published: 2026-01-07T10:04:01Z canonical: "help.frisbii.com/raison-sociale-faq" --- > ## Documentation Index > Fetch the complete documentation index at: https://help.frisbii.com/llms.txt > Use this file to discover all available pages before exploring further. # FAQ ![](https://sofacto.file.force.com/servlet/rtaImage?eid=ka0Tx000000VBqP&feoid=00N1p00000JI0JP&refid=0EM08000004Oy1S) This article lists questions that are frequently asked to our support team. ## How to start a new numbering period **Question:** Do you want to create a new numbering period? **Answer**: As a first step, please consult this article for the configuration of your numbering period: [Numbering period - Field dictionary and configuration](/frisbii-app/docs/en/période-de-numérotation-dictionnaire-de-champ-et-configuration). If you get the error message *Manual update of invoice/credit note number is not allowed* when you try to change the end date, you need to go to your **Administration tab** and uncheck the *Prevent the numbering periodicity from being modified* checkbox. If you are in a **monthly** or **yearly** numbering period: the new numbering period will be automatically created the first time an invoice is issued in this period. ## How to change the periodicity of your numbering period **Question:** Do you want to change the periodicity of your numbering period? **Answer:** If you want to modify and change the periodicity, for example from infinite to yearly, you must uncheck the *Prevent the invoice/credit note number from being modified* checkbox, then make your changes. **Warning:** you have to make the same change in the Numbering section of the Corporate name record. ## How to lock the previous numbering period

Question: You have created a new numbering period. Should you lock the previous one?

Answer: Yes, you have to set an end date and lock the previous period (as you can still issue invoices at the end of these periods, if you do not).

Example: If you change the numbering period to end on 31/12/2020 and lock it, your new numbering period will be created automatically when a new invoice is issued.

 ## How to use unique numbering
Question: How does unique numbering work and what is the difference with a "classic" numbering?

Answer: You can activate the unique numbering from the Numbering section in your corporate name tab by checking the box of the same name.

Numérotation unique Option sur la raison sociale

This ensures that your credit note reference is integrated into the numbering of your invoice reference.

Période de numérotation

An example :
Unique Numbering "Classic" Numbering
Prefix (examples) INV2100001 INV2100001 / AV210001
Reference of the next invoice (issued on 01/09/21) INV2100002 INV2100002
Reference of the next credit note (issued on 09/09/21) INV2100003 CN210002
Last invoice date (within the numbering period) 02/09/21 01/09/21
Last credit note date (within the numbering period) 09/09/21 09/09/21