diff --git a/addons/purchase/models/purchase.py b/addons/purchase/models/purchase.py
index ccdefe78d46..b0628547d7e 100644
--- a/addons/purchase/models/purchase.py
+++ b/addons/purchase/models/purchase.py
@@ -200,13 +200,15 @@ class PurchaseOrder(models.Model):
 
     @api.model
     def create(self, vals):
+        company_id = vals.get('company_id', self.default_get(['company_id'])['company_id'])
+        # Ensures default picking type and currency are taken from the right company.
+        self_comp = self.with_company(company_id)
         if vals.get('name', 'New') == 'New':
-            company_id = vals.get("company_id", self.env.company.id)
             seq_date = None
             if 'date_order' in vals:
                 seq_date = fields.Datetime.context_timestamp(self, fields.Datetime.to_datetime(vals['date_order']))
-            vals['name'] = self.env['ir.sequence'].with_company(company_id).next_by_code('purchase.order', sequence_date=seq_date) or '/'
-        return super(PurchaseOrder, self).create(vals)
+            vals['name'] = self_comp.env['ir.sequence'].next_by_code('purchase.order', sequence_date=seq_date) or '/'
+        return super(PurchaseOrder, self_comp).create(vals)
 
     @api.ondelete(at_uninstall=False)
     def _unlink_if_cancelled(self):
diff --git a/addons/purchase_stock/tests/test_purchase_order.py b/addons/purchase_stock/tests/test_purchase_order.py
index 4e6f24e3eab..90aae7a98d1 100644
--- a/addons/purchase_stock/tests/test_purchase_order.py
+++ b/addons/purchase_stock/tests/test_purchase_order.py
@@ -212,7 +212,7 @@ class TestPurchaseOrder(ValuationReconciliationTestCommon):
         self.assertEqual(po1.order_line.qty_received, 5)
         self.assertEqual(po1.picking_ids[-1].move_lines.product_qty, 10)
 
-    def test_update_date_planned(self):
+    def test_04_update_date_planned(self):
         today = datetime.today().replace(hour=9, microsecond=0)
         tomorrow = datetime.today().replace(hour=9, microsecond=0) + timedelta(days=1)
         po = self.env['purchase.order'].create(self.po_vals)
@@ -245,3 +245,21 @@ class TestPurchaseOrder(ValuationReconciliationTestCommon):
             '<p> partner_a modified receipt dates for the following products:</p><p> \xa0 - Large Desk from %s to %s </p><p> \xa0 - Conference Chair from %s to %s </p><p>Those dates couldn’t be modified accordingly on the receipt %s which had already been validated.</p>' % (today.date(), tomorrow.date(), today.date(), tomorrow.date(), po.picking_ids.name),
             activity.note,
         )
+
+    def test_05_multi_company(self):
+        company_a = self.env.user.company_id
+        company_b = self.env['res.company'].create({
+            "name": "Test Company",
+            "currency_id": self.env['res.currency'].with_context(active_test=False).search([
+                ('id', '!=', company_a.currency_id.id),
+            ], limit=1).id
+        })
+        self.env.user.write({
+            'company_id': company_b.id,
+            'company_ids': [(4, company_b.id), (4, company_a.id)],
+        })
+        po = self.env['purchase.order'].create(dict(company_id=company_a.id, partner_id=self.partner_a.id))
+
+        self.assertEqual(po.company_id, company_a)
+        self.assertEqual(po.picking_type_id.warehouse_id.company_id, company_a)
+        self.assertEqual(po.currency_id, po.company_id.currency_id)