diff --git a/addons/l10n_ro/res_partner.py b/addons/l10n_ro/res_partner.py
index 95867f8e883..4720c6f8157 100755
--- a/addons/l10n_ro/res_partner.py
+++ b/addons/l10n_ro/res_partner.py
@@ -28,11 +28,30 @@ class res_partner(osv.osv):
     _columns = {
         'nrc' : fields.char('NRC', size=16, help='Registration number at the Registry of Commerce'),
     }
+
+    # The SQL constraints are no-ops but present only to display the right error message to the
+    # user when the partial unique indexes defined below raise errors/  
+    # The real constraints need to be implemented with PARTIAL UNIQUE INDEXES (see auto_init),
+    # due to the way accounting data is delegated by contacts to their companies in OpenERP 7.0.
     _sql_constraints = [
-       ('vat_uniq', 'unique (vat)', 'The vat of the partner must be unique !'),
-       ('nrc_uniq', 'unique (nrc)', 'The code of the partner must be unique !')
+       ('vat_uniq', 'unique (id)', 'The vat of the partner must be unique !'),
+       ('nrc_uniq', 'unique (id)', 'The code of the partner must be unique !')
     ]
 
+    def _auto_init(self, cr, context=None):
+        result = super(res_partner, self)._auto_init(cr, context=context)
+        # Real implementation of the vat/nrc constraints: only "commercial entities" need to have
+        # unique numbers, and the condition for being a commercial entity is "is_company or parent_id IS NULL".
+        # Contacts inside a company automatically have a copy of the company's commercial fields
+        # (see _commercial_fields()), so they are automatically consistent.
+        cr.execute("""
+            DROP INDEX IF EXISTS res_partner_vat_uniq_for_companies;
+            DROP INDEX IF EXISTS res_partner_nrc_uniq_for_companies;
+            CREATE UNIQUE INDEX res_partner_vat_uniq_for_companies ON res_partner (vat) WHERE is_company OR parent_id IS NULL;
+            CREATE UNIQUE INDEX res_partner_nrc_uniq_for_companies ON res_partner (nrc) WHERE is_company OR parent_id IS NULL;
+        """)
+        return result
+
     def _commercial_fields(self, cr, uid, context=None):
         return super(res_partner, self)._commercial_fields(cr, uid, context=context) + ['nrc']