[ADD] accounting: New page on vendor bills sequence

task-4207830

closes #12479

X-original-commit: ed33cf3
Signed-off-by: Anne-Françoise Marcq (afma) <[email protected]>

Author: afma-odoo

content/applications/finance/accounting/vendor_bills.rst

@@ -117,3 +117,4 @@ dates, etc.
    vendor_bills/invoice_digitization
    vendor_bills/assets
    vendor_bills/deferred_expenses
+   vendor_bills/sequence

content/applications/finance/accounting/vendor_bills/sequence.rst

@@ -0,0 +1,66 @@
+====================
+Vendor bill sequence
+====================
+
+When confirming a vendor bill, Odoo generates a unique vendor bill reference number. By default, it
+uses the following sequence format `BILL/year/month/incrementing-number` (e.g.,
+`BILL/2025/01/00001`), which restarts from `00001` each year.
+
+However, it is possible to :ref:`change the sequence format <accounting/vendor_bills/resequencing>`
+and its periodicity, and to :ref:`mass-resequence vendor bills
+<accounting/vendor_bills/mass-resequencing>`.
+
+.. note::
+   Changes made to reference numbers are logged in the chatter.
+
+.. _accounting/vendor_bills/resequencing:
+
+Changing the default sequence
+=============================
+
+To customize the default sequence, open the last confirmed vendor bill, click :guilabel:`Reset to
+Draft`, and edit the vendor bill's reference number.
+
+.. image:: sequence/sequence-reference-number.png
+   :alt: Editing the reference number of a vendor bill.
+
+Odoo then explains how the detected format will be applied to all future vendor bills. For example,
+if the current vendor bill's month is withdrawn, the sequence's periodicity will change to every
+year instead of every month.
+
+.. image:: sequence/sequence-dialog.png
+   :alt: Editing the reference number of a vendor bill.
+
+.. tip::
+   The sequence format can be edited directly when creating the first vendor bill of a given
+   sequence period.
+
+.. _accounting/vendor_bills/mass-resequencing:
+
+Mass-resequencing vendor bills
+==============================
+
+It can be helpful to resequence multiple vendor bill numbers. For example, when importing vendor
+bills from another accounting system and the reference originates from the previous software,
+continuity for the current year must be maintained without restarting from the beginning.
+
+.. note::
+   This feature is only available to users with administrator or advisor access.
+
+Follow these steps to resequence vendor bill numbers:
+
+#. Activate the :ref:`developer mode <developer-mode>`.
+#. In the vendor bills list view, select the vendor bills that need a new sequence.
+#. Click the :icon:`fa-cog` :guilabel:`Actions` menu and select :guilabel:`Resequence`.
+#. In the :guilabel:`Ordering` field, choose to
+
+   - :guilabel:`Keep current order`: The order of the numbers remains the same.
+   - :guilabel:`Reorder by accounting date`: The number is reordered by accounting date.
+
+#. Set the :guilabel:`First New Sequence`.
+#. :guilabel:`Preview Modifications` and click :guilabel:`Confirm`.
+
+The first vendor bill using the new sequence appears in red in the :guilabel:`Bills` list view.
+
+.. image:: sequence/sequence-bill-sequencing.png
+   :alt: Resequence options window