The letter could be sent as a Recorded Delivery, which means it has to be signed for by the receiver.
Restricted Mail delivery is to insure that a specific individual receives a piece of mail. It can only be delivered, in person, to the addressee. The recipient typically must sign for the letter and it does cost a considerable amount more, currently $4.50 in addition to the postage.
The reason you need a stamp to mail a letter is because the stamp is the proof that you paid for your letter to be delivered. Instead of paying the mailman directly, and waiting for him to come to your house so you can pay the mailman to deliver your mail, the stamp proves that you paid for the delivery of the mail.
First class mail is delivered in 3 to 5 days
In the United States at least, Yes, to some degree. You are not allowed to keep mail that was clearly intended for another. IF mail is delivered to you in error your responsibility is basically just to return it to your carrier or post office for corrected delivery.
First class mail delivery takes 3 - 5 days.
First Class Mail is delivered in three to five days.
First Class Mail is delivered in three to five days.
First Class Mail is delivered in three to five days.
First Class Mail is delivered in three to five days.
First Class Mail is delivered in three to five days,
First Class Mail is delivered in three to five days.
First Class Mail is delivered in three to five days.
First Class Mail is delivered in three to five days.
First Class Mail is delivered in three to five days.
First class mail is delivered in three to five days.
Check your mailbox, mail slot or P.O. Box. If it is for mail delivered to someone else, ask for and pay for a delivery confirmation notice.
First Class Mail is delivered in three to five days.