Certified Mail
Provides proof of mailing at time of mailing and the date and time of delivery or attempted delivery.
$2.80

Return Receipt
This service can be added to Certified Mail to confirm delivery.
$2.30

Signature Confirmation
Provides the date and time of delivery or attempted delivery and the name of the person who signed for the item.
$2.35

Delivery Confirmation
Provides the date and time of delivery or attempted delivery.
$.80

Priority Mail
This service is typically used to send documents, gifts and merchandise. Priority Mail envelopes and boxes are available free of charge.
Pricing varies

Express Mail
This money-back guaranteed overnight to two-day service includes tracking, proof of delivery, and insurance up to $100. Delivery to most destinations is available 365 days per year with no extra charge for Saturday, Sunday and holiday delivery. Express mail envelopes and boxes are available free of charge.
Pricing varies.

For more pricing information, please visit  the USPS's pricing guide at http://www.usps.com/prices/pricechanges.htm