diff --git a/base_exception/models/base_exception.py b/base_exception/models/base_exception.py
index 1e29af359..45c153276 100644
--- a/base_exception/models/base_exception.py
+++ b/base_exception/models/base_exception.py
@@ -47,13 +47,16 @@ class ExceptionRule(models.Model):
         "not. Use failed = True to block the exception",
     )
 
-    @api.constrains("exception_type", "domain", "code")
+    @api.constrains("exception_type", "domain", "code", "model")
     def check_exception_type_consistency(self):
         for rule in self:
             if (
                 (rule.exception_type == "by_py_code" and not rule.code)
                 or (rule.exception_type == "by_domain" and not rule.domain)
-                or (rule.exception_type == "by_method" and not rule.method)
+                or (
+                    rule.exception_type == "by_method"
+                    and not self._check_method_valid(rule.method, rule.model)
+                )
             ):
                 raise ValidationError(
                     _(
@@ -63,6 +66,13 @@ class ExceptionRule(models.Model):
                     )
                 )
 
+    def _check_method_valid(self, method_name, model_name):
+        model = self.env[model_name]
+        method = getattr(model, method_name)
+        if method and callable(method):
+            return True
+        return False
+
     @api.multi
     def _get_domain(self):
         """ override me to customize domains according exceptions cases """
diff --git a/base_exception/tests/purchase_test.py b/base_exception/tests/purchase_test.py
index 3b5d806ed..c7c4dfe4d 100644
--- a/base_exception/tests/purchase_test.py
+++ b/base_exception/tests/purchase_test.py
@@ -62,6 +62,13 @@ class PurchaseTest(models.Model):
     def _reverse_field(self):
         return "test_purchase_ids"
 
+    def exception_method_no_zip(self):
+        records_fail = self.env["base.exception.test.purchase"]
+        for rec in self:
+            if not rec.partner_id.zip:
+                records_fail += rec
+        return records_fail
+
 
 class LineTest(models.Model):
     _name = "base.exception.test.purchase.line"
diff --git a/base_exception/tests/test_base_exception.py b/base_exception/tests/test_base_exception.py
index 0a73f0250..e67f05e16 100644
--- a/base_exception/tests/test_base_exception.py
+++ b/base_exception/tests/test_base_exception.py
@@ -33,51 +33,81 @@ class TestBaseException(common.SavepointCase):
             ("base.exception.test.purchase.line", "Purchase Order Line")
         )
 
-        cls.exceptionnozip = cls.env["exception.rule"].create(
+        cls.partner = cls.env.ref("base.res_partner_1")
+        cls.partner.zip = False
+        cls.potest1 = cls.env["base.exception.test.purchase"].create(
             {
-                "name": "No ZIP code on destination",
-                "sequence": 10,
-                "model": "base.exception.test.purchase",
-                "code": "if not obj.partner_id.zip: failed=True",
+                "name": "Test base exception to basic purchase",
+                "partner_id": cls.partner.id,
+                "line_ids": [
+                    (0, 0, {"name": "line test", "amount": 120.0, "qty": 1.5})
+                ],
             }
         )
 
-        cls.exceptionno_minorder = cls.env["exception.rule"].create(
+    def test_purchase_order_valid(self):
+        self.potest1.button_confirm()
+        self.assertFalse(self.potest1.exception_ids)
+
+    def test_purchase_order_exception_invalid_amt_total(self):
+        self.exception_amount_total = self.env["exception.rule"].create(
             {
                 "name": "Min order except",
                 "sequence": 10,
                 "model": "base.exception.test.purchase",
                 "code": "if obj.amount_total <= 200.0: failed=True",
+                "exception_type": "by_py_code",
             }
         )
+        with self.assertRaises(ValidationError):
+            self.potest1.button_confirm()
+        self.assertTrue(self.potest1.exception_ids)
 
-        cls.exceptionno_lineqty = cls.env["exception.rule"].create(
+    def test_purchase_order_exception_invalid_partner_zip(self):
+        self.exception_partner_no_zip = self.env["exception.rule"].create(
             {
-                "name": "Qty > 0",
+                "name": "No ZIP code on destination",
                 "sequence": 10,
-                "model": "base.exception.test.purchase.line",
-                "code": "if obj.qty <= 0: failed=True",
+                "model": "base.exception.test.purchase",
+                "code": "if not obj.partner_id.zip: failed=True",
+                "exception_type": "by_py_code",
             }
         )
+        with self.assertRaises(ValidationError):
+            self.potest1.button_confirm()
+        self.assertTrue(self.potest1.exception_ids)
 
-    def test_purchase_order_exception(self):
-        partner = self.env.ref("base.res_partner_1")
-        partner.zip = False
-        potest1 = self.env["base.exception.test.purchase"].create(
+    def test_purchase_order_exception_name(self):
+        self.exception_no_name = self.env["exception.rule"].create(
             {
-                "name": "Test base exception to basic purchase",
-                "partner_id": partner.id,
-                "line_ids": [
-                    (0, 0, {"name": "line test", "amount": 120.0, "qty": 1.5})
-                ],
+                "name": "No name",
+                "sequence": 10,
+                "model": "base.exception.test.purchase",
+                "method": "exception_method_no_zip",
+                "exception_type": "by_method",
+            }
+        )
+        with self.assertRaises(ValidationError):
+            self.potest1.button_confirm()
+        self.assertTrue(self.potest1.exception_ids)
+
+    def test_ignore_exception(self):
+        # same as 1st test
+        self.exception_amount_total = self.env["exception.rule"].create(
+            {
+                "name": "Min order except",
+                "sequence": 10,
+                "model": "base.exception.test.purchase",
+                "code": "if obj.amount_total <= 200.0: failed=True",
+                "exception_type": "by_py_code",
             }
         )
         # Block because of exception during validation
         with self.assertRaises(ValidationError):
-            potest1.button_confirm()
+            self.potest1.button_confirm()
         # Test that we have linked exceptions
-        self.assertTrue(potest1.exception_ids)
+        self.assertTrue(self.potest1.exception_ids)
         # Test ignore exeception make possible for the po to validate
-        potest1.ignore_exception = True
-        potest1.button_confirm()
-        self.assertTrue(potest1.state == "purchase")
+        self.potest1.ignore_exception = True
+        self.potest1.button_confirm()
+        self.assertTrue(self.potest1.state == "purchase")