diff --git a/addons/account/models/account.py b/addons/account/models/account.py
index c84c7d06911..e3c093991ed 100644
--- a/addons/account/models/account.py
+++ b/addons/account/models/account.py
@@ -93,7 +93,7 @@ class AccountAccount(models.Model):
     def _check_reconcile(self):
         for account in self:
             if account.internal_type in ('receivable', 'payable') and account.reconcile == False:
-                raise ValueError(_('You cannot have a receivable/payable account that is not reconciliable. (account code: %s)') % account.code)
+                raise ValidationError(_('You cannot have a receivable/payable account that is not reconciliable. (account code: %s)') % account.code)
 
     name = fields.Char(required=True, index=True)
     currency_id = fields.Many2one('res.currency', string='Account Currency',
@@ -265,9 +265,9 @@ class AccountJournal(models.Model):
     def _check_currency(self):
         if self.currency_id:
             if self.default_credit_account_id and not self.default_credit_account_id.currency_id.id == self.currency_id.id:
-                raise UserError(_('Configuration error!\nThe currency of the journal should be the same than the default credit account.'))
+                raise ValidationError(_('Configuration error!\nThe currency of the journal should be the same than the default credit account.'))
             if self.default_debit_account_id and not self.default_debit_account_id.currency_id.id == self.currency_id.id:
-                raise UserError(_('Configuration error!\nThe currency of the journal should be the same than the default debit account.'))
+                raise ValidationError(_('Configuration error!\nThe currency of the journal should be the same than the default debit account.'))
 
     @api.one
     @api.constrains('type', 'bank_account_id')
@@ -530,7 +530,7 @@ class AccountTax(models.Model):
     @api.constrains('children_tax_ids', 'type_tax_use')
     def _check_children_scope(self):
         if not all(child.type_tax_use in ('none', self.type_tax_use) for child in self.children_tax_ids):
-            raise UserError(_('The application scope of taxes in a group must be either the same as the group or "None".'))
+            raise ValidationError(_('The application scope of taxes in a group must be either the same as the group or "None".'))
 
     @api.one
     def copy(self, default=None):
diff --git a/addons/account/models/account_invoice.py b/addons/account/models/account_invoice.py
index ff79875cd28..ac5f6d5b534 100644
--- a/addons/account/models/account_invoice.py
+++ b/addons/account/models/account_invoice.py
@@ -1309,7 +1309,7 @@ class AccountPaymentTermLine(models.Model):
     @api.constrains('value', 'value_amount')
     def _check_percent(self):
         if self.value == 'percent' and (self.value_amount < 0.0 or self.value_amount > 100.0):
-            raise UserError(_('Percentages for Payment Term Line must be between 0 and 100.'))
+            raise ValidationError(_('Percentages for Payment Term Line must be between 0 and 100.'))
 
     @api.onchange('option')
     def _onchange_option(self):
diff --git a/addons/account/models/account_move.py b/addons/account/models/account_move.py
index 07b0adcbc76..f1cbcd6fa17 100644
--- a/addons/account/models/account_move.py
+++ b/addons/account/models/account_move.py
@@ -4,7 +4,7 @@ import time
 from collections import OrderedDict
 from openerp import api, fields, models, _
 from openerp.osv import expression
-from openerp.exceptions import RedirectWarning, UserError
+from openerp.exceptions import RedirectWarning, UserError, ValidationError
 from openerp.tools.misc import formatLang
 from openerp.tools import float_is_zero, float_compare
 from openerp.tools.safe_eval import safe_eval
@@ -386,14 +386,14 @@ class AccountMoveLine(models.Model):
         for line in self:
             if line.account_id.currency_id:
                 if not line.currency_id or line.currency_id.id != line.account_id.currency_id.id:
-                    raise UserError(_('The selected account of your Journal Entry forces to provide a secondary currency. You should remove the secondary currency on the account.'))
+                    raise ValidationError(_('The selected account of your Journal Entry forces to provide a secondary currency. You should remove the secondary currency on the account.'))
 
     @api.multi
     @api.constrains('currency_id', 'amount_currency')
     def _check_currency_and_amount(self):
         for line in self:
             if (line.amount_currency and not line.currency_id):
-                raise UserError(_("You cannot create journal items with a secondary currency without filling both 'currency' and 'amount currency' field."))
+                raise ValidationError(_("You cannot create journal items with a secondary currency without filling both 'currency' and 'amount currency' field."))
 
     @api.multi
     @api.constrains('amount_currency')
@@ -401,7 +401,7 @@ class AccountMoveLine(models.Model):
         for line in self:
             if line.amount_currency:
                 if (line.amount_currency > 0.0 and line.credit > 0.0) or (line.amount_currency < 0.0 and line.debit > 0.0):
-                    raise UserError(_('The amount expressed in the secondary currency must be positive when account is debited and negative when account is credited.'))
+                    raise ValidationError(_('The amount expressed in the secondary currency must be positive when account is debited and negative when account is credited.'))
 
     ####################################################
     # Reconciliation interface methods
diff --git a/addons/event/models/event.py b/addons/event/models/event.py
index 03bc96d1d1a..a60e06842a8 100644
--- a/addons/event/models/event.py
+++ b/addons/event/models/event.py
@@ -3,7 +3,7 @@
 import pytz
 
 from openerp import _, api, fields, models
-from openerp.exceptions import AccessError, UserError
+from openerp.exceptions import AccessError, UserError, ValidationError
 
 class event_type(models.Model):
     """ Event Type """
@@ -196,13 +196,13 @@ class event_event(models.Model):
     @api.constrains('seats_max', 'seats_available')
     def _check_seats_limit(self):
         if self.seats_availability == 'limited' and self.seats_max and self.seats_available < 0:
-            raise UserError(_('No more available seats.'))
+            raise ValidationError(_('No more available seats.'))
 
     @api.one
     @api.constrains('date_begin', 'date_end')
     def _check_closing_date(self):
         if self.date_end < self.date_begin:
-            raise UserError(_('Closing Date cannot be set before Beginning Date.'))
+            raise ValidationError(_('Closing Date cannot be set before Beginning Date.'))
 
     @api.model
     def create(self, vals):
@@ -296,7 +296,7 @@ class event_registration(models.Model):
     @api.constrains('event_id', 'state')
     def _check_seats_limit(self):
         if self.event_id.seats_availability == 'limited' and self.event_id.seats_max and self.event_id.seats_available < (1 if self.state == 'draft' else 0):
-            raise UserError(_('No more seats available for this event.'))
+            raise ValidationError(_('No more seats available for this event.'))
 
     @api.multi
     def _check_auto_confirmation(self):
diff --git a/addons/event_sale/models/event.py b/addons/event_sale/models/event.py
index 94bed87bed3..c54bde9eb24 100644
--- a/addons/event_sale/models/event.py
+++ b/addons/event_sale/models/event.py
@@ -2,7 +2,7 @@
 
 from openerp import models, fields, api, _
 import openerp.addons.decimal_precision as dp
-from openerp.exceptions import UserError
+from openerp.exceptions import ValidationError
 from openerp.osv import fields as old_fields
 
 
@@ -128,7 +128,7 @@ class event_ticket(models.Model):
     @api.constrains('registration_ids', 'seats_max')
     def _check_seats_limit(self):
         if self.seats_max and self.seats_available < 0:
-            raise UserError(_('No more available seats for the ticket'))
+            raise ValidationError(_('No more available seats for the ticket'))
 
     @api.onchange('product_id')
     def onchange_product_id(self):
@@ -150,7 +150,7 @@ class event_registration(models.Model):
     @api.constrains('event_ticket_id', 'state')
     def _check_ticket_seats_limit(self):
         if self.event_ticket_id.seats_max and self.event_ticket_id.seats_available < 0:
-            raise UserError(_('No more available seats for this ticket'))
+            raise ValidationError(_('No more available seats for this ticket'))
 
     @api.multi
     def _check_auto_confirmation(self):
diff --git a/addons/lunch/models/lunch.py b/addons/lunch/models/lunch.py
index c4906072ad9..cb6e886a75c 100644
--- a/addons/lunch/models/lunch.py
+++ b/addons/lunch/models/lunch.py
@@ -4,7 +4,7 @@ import datetime
 
 from openerp import models, fields, api, _
 import openerp.addons.decimal_precision as dp
-from openerp.exceptions import AccessError, UserError
+from openerp.exceptions import AccessError, ValidationError
 
 
 class LunchOrder(models.Model):
@@ -95,7 +95,7 @@ class LunchOrder(models.Model):
         date_order = datetime.datetime.strptime(self.date, '%Y-%m-%d')
         date_today = datetime.datetime.strptime(fields.Date.context_today(self), '%Y-%m-%d')
         if (date_order < date_today):
-            raise UserError(_('The date of your order is in the past.'))
+            raise ValidationError(_('The date of your order is in the past.'))
 
     @api.one
     @api.depends('order_line_ids.state')
diff --git a/addons/mail/models/mail_alias.py b/addons/mail/models/mail_alias.py
index 5581607de18..d15b072b9d4 100644
--- a/addons/mail/models/mail_alias.py
+++ b/addons/mail/models/mail_alias.py
@@ -5,7 +5,7 @@ import re
 import unicodedata
 
 from openerp import _, api, fields, models, SUPERUSER_ID
-from openerp.exceptions import UserError
+from openerp.exceptions import ValidationError
 from openerp.modules.registry import RegistryManager
 from openerp.tools import ustr
 from openerp.tools.safe_eval import safe_eval as eval
@@ -96,7 +96,7 @@ class Alias(models.Model):
         try:
             dict(eval(self.alias_defaults))
         except Exception:
-            raise UserError(_('Invalid expression, it must be a literal python dictionary definition e.g. "{\'field\': \'value\'}"'))
+            raise ValidationError(_('Invalid expression, it must be a literal python dictionary definition e.g. "{\'field\': \'value\'}"'))
 
     @api.model
     def create(self, vals):
diff --git a/addons/sale_timesheet/models/sale_timesheet.py b/addons/sale_timesheet/models/sale_timesheet.py
index e2cdbc0efed..37e0f01ceab 100644
--- a/addons/sale_timesheet/models/sale_timesheet.py
+++ b/addons/sale_timesheet/models/sale_timesheet.py
@@ -4,7 +4,7 @@
 from openerp import models, api, fields
 from openerp.tools.translate import _
 
-from openerp.exceptions import UserError
+from openerp.exceptions import ValidationError
 
 
 class ResCompany(models.Model):
@@ -131,7 +131,7 @@ class SaleOrder(models.Model):
                 if line.product_id.track_service == 'timesheet':
                     count += 1
                 if count > 1:
-                    raise UserError(_("You can use only one product on timesheet within the same sale order. You should split your order to include only one contract based on time and material."))
+                    raise ValidationError(_("You can use only one product on timesheet within the same sale order. You should split your order to include only one contract based on time and material."))
         return {}
 
     @api.multi
diff --git a/addons/website_forum/models/forum.py b/addons/website_forum/models/forum.py
index 4189921f0d6..33be8629dd5 100644
--- a/addons/website_forum/models/forum.py
+++ b/addons/website_forum/models/forum.py
@@ -15,7 +15,7 @@ from openerp import modules
 from openerp import tools
 from openerp import SUPERUSER_ID
 from openerp.addons.website.models.website import slug
-from openerp.exceptions import UserError
+from openerp.exceptions import UserError, ValidationError
 
 _logger = logging.getLogger(__name__)
 
@@ -139,7 +139,7 @@ class Forum(models.Model):
         if (self.default_post_type == 'question' and not self.allow_question) \
                 or (self.default_post_type == 'discussion' and not self.allow_discussion) \
                 or (self.default_post_type == 'link' and not self.allow_link):
-            raise UserError(_('You cannot choose %s as default post since the forum does not allow it.') % self.default_post_type)
+            raise ValidationError(_('You cannot choose %s as default post since the forum does not allow it.') % self.default_post_type)
 
     @api.one
     def _compute_count_posts_waiting_validation(self):
@@ -414,7 +414,7 @@ class Post(models.Model):
         if (self.post_type == 'question' and not self.forum_id.allow_question) \
                 or (self.post_type == 'discussion' and not self.forum_id.allow_discussion) \
                 or (self.post_type == 'link' and not self.forum_id.allow_link):
-            raise UserError(_('This forum does not allow %s') % self.post_type)
+            raise ValidationError(_('This forum does not allow %s') % self.post_type)
 
     def _update_content(self, content, forum_id):
         forum = self.env['forum.forum'].browse(forum_id)
diff --git a/openerp/addons/base/ir/ir_model.py b/openerp/addons/base/ir/ir_model.py
index 91d8cf15c12..9138b658e1d 100644
--- a/openerp/addons/base/ir/ir_model.py
+++ b/openerp/addons/base/ir/ir_model.py
@@ -275,9 +275,9 @@ class IrModelFields(models.Model):
         if self.state == 'manual' and self.related:
             field = self._related_field()
             if field.type != self.ttype:
-                raise UserError(_("Related field '%s' does not have type '%s'") % (self.related, self.ttype))
+                raise ValidationError(_("Related field '%s' does not have type '%s'") % (self.related, self.ttype))
             if field.relational and field.comodel_name != self.relation:
-                raise UserError(_("Related field '%s' does not have comodel '%s'") % (self.related, self.relation))
+                raise ValidationError(_("Related field '%s' does not have comodel '%s'") % (self.related, self.relation))
 
     @api.onchange('related')
     def _onchange_related(self):
diff --git a/openerp/addons/test_new_api/models.py b/openerp/addons/test_new_api/models.py
index e39135c89fc..41264e71e37 100644
--- a/openerp/addons/test_new_api/models.py
+++ b/openerp/addons/test_new_api/models.py
@@ -157,7 +157,7 @@ class Message(models.Model):
     @api.constrains('author', 'discussion')
     def _check_author(self):
         if self.discussion and self.author not in self.discussion.participants:
-            raise ValueError(_("Author must be among the discussion participants."))
+            raise ValidationError(_("Author must be among the discussion participants."))
 
     @api.one
     @api.depends('author.name', 'discussion.name')
diff --git a/openerp/models.py b/openerp/models.py
index e45adf7f859..3628b0c652b 100644
--- a/openerp/models.py
+++ b/openerp/models.py
@@ -109,9 +109,9 @@ def raise_on_invalid_object_name(name):
 def check_pg_name(name):
     """ Check whether the given name is a valid PostgreSQL identifier name. """
     if not regex_pg_name.match(name):
-        raise ValueError("Invalid characters in table name %r" % name)
+        raise ValidationError("Invalid characters in table name %r" % name)
     if len(name) > 63:
-        raise ValueError("Table name %r is too long" % name)
+        raise ValidationError("Table name %r is too long" % name)
 
 POSTGRES_CONFDELTYPES = {
     'RESTRICT': 'r',