Lies folgenden Link:

http://www.uh.edu/postal/accountable.html

A. Registered Mail

The most secure option offered by the U.S. Postal Service is registered mail. The service is designed to provide added protection for valuable and important mail. Postal insurance may be purchased at the option of the mailer, up to maximum of $25,000. Return receipt* and restricted delivery services (deliver only to a specific individual) are available for additional fees. Registered articles are controlled from the point of mailing to delivery. First Class postage is required on all registered mail. Please write on your department mailing card that you wish a mail piece to be registered and, if you wish to insure the item, how much insurance you want. Registered mail cannot be sealed or secured with scotch, masking, or any type of cellulose tape. USE BROWN PAPER TAPE ONLY.

B. Insured Mail

Insurance is available for up to $5000 value for Standard B mail. Standard B matter mailed at First Class rate must be endorsed "Standard B Matter Enclosed" in addition to the First Class or Priority Mail endorsement. For articles insured for more than $50, a receipt of delivery is signed by the recipient and filed at the delivery post office. Do not over-insure your packages. The amount of insurance coverage for loss will be actual value, less depreciation, and no payments are made for sentimental losses or for any expenses incurred as a result of the loss. You may obtain a return receipt* and request restricted delivery for additional fees. Please write on your department mailing card that you wish to have the mail piece insured and the amount of insurance desired.

* Return receipts must be completed by the department and accompany the mail piece. The return receipts (green cards for domestic, pink cards for international) are available from UH Postal Services upon request.

C. Certified Mail

Certified mail is first class material for which the sender wants written evidence of its delivery. Please write on your department mailing card that you wish the mail piece(s) to be certified. Return receipt and restricted delivery is available for additional fees. Certified mail does not provide insurance. Foreign mail cannot be certified; it must be sent as registered mail.