It will be slower than regular first class mail, as it must be locked up and signed for at each stop. You must indicate the dollar value of the item you are sending if you request registered service. If you are mailing a check, do not insure it for the value of the check, as you will only be refunded the cost of stopping payment and issuing a new check. Registered mail is available for domestic and international mail. DO NOT use plastic tape when preparing a Registered item, as it has to be hand stamped.
Certified mail is available for domestic mail only.
Standard mail or Parcel Post items mailed at First Class rates. The return receipt is attached to the mail piece at the time of mailing, signed by the recipient upon delivery, and returned to the sender by first class mail. This is generally used to verify delivery of documents and valuable items. We will not attach a return receipt unless it is requested. When time is less of an issue than cost, printed matter or books can be sent by Standard Mail.