diff --git a/erpnext/stock/doctype/bin/bin.py b/erpnext/stock/doctype/bin/bin.py
index 8e1c949..2b680e5 100644
--- a/erpnext/stock/doctype/bin/bin.py
+++ b/erpnext/stock/doctype/bin/bin.py
@@ -44,6 +44,7 @@
 	def update_stock(self, actual_qty=0, reserved_qty=0, ordered_qty=0, indented_qty=0, planned_qty=0, dt=None, sle_id='', posting_time='', serial_no = '', is_cancelled = 'No',doc_type='',doc_name='',is_amended='No'):
 		if not dt: 
 			dt = nowdate()
+			
 		# update the stock values (for current quantities)
 		self.doc.actual_qty = flt(self.doc.actual_qty) + flt(actual_qty)
 		self.doc.ordered_qty = flt(self.doc.ordered_qty) + flt(ordered_qty)
@@ -298,7 +299,7 @@
 			order by timestamp(posting_date, posting_time) asc, name asc""", \
 				(self.doc.item_code, self.doc.warehouse, \
 					prev_sle.get('posting_date','1900-01-01'), prev_sle.get('posting_time', '12:00')), as_dict = 1)
-		for sle in sll:
+		for sle in sll:		
 			# block if stock level goes negative on any date
 			if val_method != 'Moving Average' or flt(allow_negative_stock) == 0:
 				self.validate_negative_stock(cqty, sle)
diff --git a/erpnext/stock/doctype/stock_ledger_entry/stock_ledger_entry.py b/erpnext/stock/doctype/stock_ledger_entry/stock_ledger_entry.py
index 58ad4c2..dbc9d6c 100644
--- a/erpnext/stock/doctype/stock_ledger_entry/stock_ledger_entry.py
+++ b/erpnext/stock/doctype/stock_ledger_entry/stock_ledger_entry.py
@@ -90,9 +90,17 @@
 			if getdate(self.doc.posting_date) <= getdate(stock_frozen_upto) and not stock_auth_role in webnotes.user.get_roles():
 				msgprint("You are not authorized to do / modify back dated stock entries before %s" % getdate(stock_frozen_upto).strftime('%d-%m-%Y'), raise_exception=1)
 
+	def validate_posting_time(self):
+		""" Validate posting time format"""
+		if self.doc.posting_time and len(cstr(self.doc.posting_time)) == 8 and cstr(self.doc.posting_time)[-2:] != '00':
+			msgprint("Wrong format of posting time, can not complete the transaction. If you think \
+				you entered posting time correctly, please contact ERPNext support team.")
+			raise Exception
+	
 
 	def validate(self):
 		self.validate_mandatory()
+		self.validate_posting_time()
 		self.validate_item()
 		self.actual_amt_check()
 		self.check_stock_frozen_date()