Belgium Partner Identification Numbers

This module extends the partner identification feature with two ready-to-use Belgian ID categories.

• "Belgium national registration number" (code be_nat_reg_num)
• "Belgium ID Card" (code be_id_card)

These categories become available wherever partner identification numbers are managed, so you can store the national registry number or the ID card number on a contact and choose the matching category.

When a number is saved, Odoo runs a validation check. The national registration number must contain exactly 11 digits and pass a checksum calculation based on the first nine digits and the last two. The ID card number must contain exactly 12 digits and pass a checksum based on the first ten digits and the last two. Non-digit characters are ignored during the check. If the number does not match the expected format or checksum, the validation fails.

The national registration number check does not support people older than 100 years, because the birth-year logic only covers the current century.

The module only touches the res.partner.id_category model and adds no new menus or screens of its own; the categories appear inside the existing partner identification interface.