diff --git a/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.py b/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.py
index 87d40fc..8c54c15 100644
--- a/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.py
+++ b/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.py
@@ -4,7 +4,7 @@
 
 from __future__ import unicode_literals
 import frappe, erpnext
-from frappe.utils import cint, cstr, formatdate, flt, getdate, nowdate
+from frappe.utils import cint, cstr, formatdate, flt, getdate, nowdate, get_link_to_form
 from frappe import _, throw
 import frappe.defaults
 
@@ -267,16 +267,30 @@
 
 	def po_required(self):
 		if frappe.db.get_value("Buying Settings", None, "po_required") == 'Yes':
+
+			if frappe.get_value('Supplier', self.supplier, 'allow_purchase_invoice_creation_without_purchase_order'):
+				return
+
 			for d in self.get('items'):
 				if not d.purchase_order:
-					throw(_("As per the Buying Settings if Purchase Order Required == 'YES', then for creating Purchase Invoice, user need to create Purchase Order first for item {0}").format(d.item_code))
+					throw(_("""Purchase Order Required for item {0}
+						To submit the invoice without purchase order please set
+						{1} as {2} in {3}""").format(frappe.bold(d.item_code), frappe.bold(_('Purchase Order Required')),
+						frappe.bold('No'), get_link_to_form('Buying Settings', 'Buying Settings', 'Buying Settings')))
 
 	def pr_required(self):
 		stock_items = self.get_stock_items()
 		if frappe.db.get_value("Buying Settings", None, "pr_required") == 'Yes':
+
+			if frappe.get_value('Supplier', self.supplier, 'allow_purchase_invoice_creation_without_purchase_receipt'):
+				return
+
 			for d in self.get('items'):
 				if not d.purchase_receipt and d.item_code in stock_items:
-					throw(_("As per the Buying Settings if Purchase Reciept Required == 'YES', then for creating Purchase Invoice, user need to create Purchase Receipt first for item {0}").format(d.item_code))
+					throw(_("""Purchase Receipt Required for item {0}
+						To submit the invoice without purchase receipt please set
+						{1} as {2} in {3}""").format(frappe.bold(d.item_code), frappe.bold(_('Purchase Receipt Required')),
+						frappe.bold('No'), get_link_to_form('Buying Settings', 'Buying Settings', 'Buying Settings')))
 
 	def validate_write_off_account(self):
 		if self.write_off_amount and not self.write_off_account:
diff --git a/erpnext/accounts/doctype/sales_invoice/sales_invoice.py b/erpnext/accounts/doctype/sales_invoice/sales_invoice.py
index a421662..5b80349 100644
--- a/erpnext/accounts/doctype/sales_invoice/sales_invoice.py
+++ b/erpnext/accounts/doctype/sales_invoice/sales_invoice.py
@@ -546,12 +546,17 @@
 		"""check in manage account if sales order / delivery note required or not."""
 		if self.is_return:
 			return
-		dic = {'Sales Order':['so_required', 'is_pos'],'Delivery Note':['dn_required', 'update_stock']}
-		for i in dic:
-			if frappe.db.get_single_value('Selling Settings', dic[i][0]) == 'Yes':
+
+		prev_doc_field_map = {'Sales Order': ['so_required', 'is_pos'],'Delivery Note': ['dn_required', 'update_stock']}
+		for key, value in iteritems(prev_doc_field_map):
+			if frappe.db.get_single_value('Selling Settings', value[0]) == 'Yes':
+
+				if frappe.get_value('Customer', self.customer, value[0]):
+					continue
+
 				for d in self.get('items'):
-					if (d.item_code and not d.get(i.lower().replace(' ','_')) and not self.get(dic[i][1])):
-						msgprint(_("{0} is mandatory for Item {1}").format(i,d.item_code), raise_exception=1)
+					if (d.item_code and not d.get(key.lower().replace(' ', '_')) and not self.get(value[1])):
+						msgprint(_("{0} is mandatory for Item {1}").format(key, d.item_code), raise_exception=1)
 
 
 	def validate_proj_cust(self):
diff --git a/erpnext/buying/doctype/supplier/supplier.json b/erpnext/buying/doctype/supplier/supplier.json
index 1ab171a..4606395 100644
--- a/erpnext/buying/doctype/supplier/supplier.json
+++ b/erpnext/buying/doctype/supplier/supplier.json
@@ -27,6 +27,8 @@
   "supplier_type",
   "pan",
   "language",
+  "allow_purchase_invoice_creation_without_purchase_order",
+  "allow_purchase_invoice_creation_without_purchase_receipt",
   "disabled",
   "warn_rfqs",
   "warn_pos",
@@ -364,13 +366,25 @@
    "fieldname": "is_frozen",
    "fieldtype": "Check",
    "label": "Is Frozen"
+  },
+  {
+   "default": "0",
+   "fieldname": "allow_purchase_invoice_creation_without_purchase_order",
+   "fieldtype": "Check",
+   "label": "Allow Purchase Invoice Creation Without Purchase Order"
+  },
+  {
+   "default": "0",
+   "fieldname": "allow_purchase_invoice_creation_without_purchase_receipt",
+   "fieldtype": "Check",
+   "label": "Allow Purchase Invoice Creation Without Purchase Receipt"
   }
  ],
  "icon": "fa fa-user",
  "idx": 370,
  "image_field": "image",
  "links": [],
- "modified": "2019-12-19 18:17:16.614567",
+ "modified": "2020-03-17 09:48:30.578242",
  "modified_by": "Administrator",
  "module": "Buying",
  "name": "Supplier",
diff --git a/erpnext/selling/doctype/customer/customer.json b/erpnext/selling/doctype/customer/customer.json
index df563ee..557c715 100644
--- a/erpnext/selling/doctype/customer/customer.json
+++ b/erpnext/selling/doctype/customer/customer.json
@@ -25,6 +25,8 @@
   "territory",
   "tax_id",
   "tax_category",
+  "so_required",
+  "dn_required",
   "disabled",
   "is_internal_customer",
   "represents_company",
@@ -465,13 +467,25 @@
    "fieldtype": "Table",
    "label": "Credit Limit",
    "options": "Customer Credit Limit"
+  },
+  {
+   "default": "0",
+   "fieldname": "so_required",
+   "fieldtype": "Check",
+   "label": "Allow Sales Invoice Creation Without Sales Order"
+  },
+  {
+   "default": "0",
+   "fieldname": "dn_required",
+   "fieldtype": "Check",
+   "label": "Allow Sales Invoice Creation Without Delivery Note"
   }
  ],
  "icon": "fa fa-user",
  "idx": 363,
  "image_field": "image",
  "links": [],
- "modified": "2020-01-29 20:36:37.879581",
+ "modified": "2020-03-17 11:03:42.706907",
  "modified_by": "Administrator",
  "module": "Selling",
  "name": "Customer",