On the subject of mail.
worked 1 day in express delivery (in time, personally, to the door): client1 - on the day of delivery to work took the day off, client2- telephone number for communication "disabled for non-payment", client3- "we have no warehouse today, take no one", client 4- telephone for communication "this type of communication is not available for the subscriber"... so it worked 1 day. The fact that the correspondence did not arrive on time, the fault is not only "postalion"...