partner-contact/partner_supplier_information/res_partner_view.xml

<?xml version="1.0" encoding="utf-8"?>
<openerp>
  <data>
    <!--Add legal form, ong,acronym,confirmed supplier,
      rcs number,rcs date, rcs and SIRET number fields in form view-->
    <record id="view_partner_property_supplier_info_form" model="ir.ui.view">
      <field name="name">res.partner.property.supplier.info.form.inherit</field>
      <field name="model">res.partner</field>
      <field name="inherit_id" ref="account.view_partner_property_form"/>
      <field name="arch" type="xml">
        <xpath expr="//page[@string='Accounting']/group[1]/group[2]"
               position="after">
         <group string="Supplier Information" col="4" colspan="4"
                attrs="{'invisible': [('supplier', '=', False)]}">
            <field name="legal_form"/>
            <field name="ong"/>
            <field name="acronym"/>
            <field name="confirmed_supplier"/>
         </group>
         <group string="Information" col="4" colspan="4"
                attrs="{'invisible': [('confirmed_supplier', '=', False)]}">
              <field name="rcs_registration_number"/>
              <field name="rcs_date"/>
              <field name="rcs_registration_location"/>
         </group>
        </xpath>

        <!--add matriculation number in form view-->
        <field name="last_reconciliation_date"
               position="after">
          <field name="matriculation_number"
                 attrs="{'invisible': [('confirmed_supplier', '=', False)]}"/>
        </field>
      </field>
    </record>
  </data>
</openerp>