diff -r 04443e7121ac trytond/trytond/modules/stock_lot/product.py
--- a/trytond/trytond/modules/stock_lot/product.py	Sat Jun 10 01:36:54 2017 +0200
+++ b/trytond/trytond/modules/stock_lot/product.py	Thu Mar 14 12:43:27 2019 +0100
@@ -1,8 +1,10 @@
 #This file is part of Tryton.  The COPYRIGHT file at the top level of
 #this repository contains the full copyright notices and license terms.
+from sql import Null
+from trytond.transaction import Transaction
 from trytond.model import ModelSQL, fields
 from trytond.pyson import Eval
-from trytond.pool import PoolMeta
+from trytond.pool import Pool, PoolMeta

 __all__ = ['Template', 'Product', 'TemplateLotType']
 __metaclass__ = PoolMeta
@@ -20,6 +22,56 @@
             },
         depends=['type'])

+    @classmethod
+    def __setup__(cls):
+        super(Template, cls).__setup__()
+        cls._error_messages.update({
+                'move_without_lot': 'There is a move without lot: "%s"',
+                })
+
+    def check_moves_without_lot(self):
+        "Check if there are moves without lot"
+        pool = Pool()
+        Move = pool.get('stock.move')
+        Product = pool.get('product.product')
+        Template = pool.get('product.template')
+        Location = pool.get('stock.location')
+
+        move = Move.__table__()
+        product = Product.__table__()
+        template = Template.__table__()
+        location = Location.__table__()
+        location2 = Location.__table__()
+        lot_required_ubications = [t.code for t in self.lot_required]
+        if not lot_required_ubications:
+            return
+
+        cursor = Transaction().cursor
+
+        sql_where = ((move.lot == Null) & (template.id == self.id) & (move.state == 'done') & (move.quantity > 0))
+        query = move.join(
+                product, condition=product.id == move.product).join(
+                template, condition=template.id == product.template).join(
+                location, condition=location.id == move.from_location).join(
+                location2, condition=location2.id == move.to_location).select(
+                location.type, location2.type, where=sql_where)
+
+        cursor.execute(*query)
+        for type1, type2 in cursor.fetchall():
+            move_without_lot = None
+            if (type1 in lot_required_ubications):
+                move_without_lot = type1
+            if (type2 in lot_required_ubications):
+                move_without_lot = type2
+            if move_without_lot:
+                self.raise_user_error('move_without_lot', move_without_lot)
+
+    @classmethod
+    def validate(cls, templates):
+        super(Template, cls).validate(templates)
+        for template in templates:
+            template.check_moves_without_lot()
+

 class Product:
     __name__ = 'product.product'