Untreated heart attacks may slow blood flow enough that blood may start to clot and prevent the flow of blood to the brain or other major organs. Extremely low blood pressure can also result from drug overdose and reactions to drugs. Therefore, brain ischemia can result from events other than heart attacks.
What Is Return Receipt? The USPSÂ® offers a service called Return Receipt that gives you peace of mind by providing evidence of delivery in the form of a postcard signed by the recipient or an e-mail with an electronic copy of the recipientâs signature. Return Receipt is available for Priority Mail ExpressÂ®, Priority MailÂ®, First Class MailÂ®, Retail GroundÂ® and Media Mail.
USPS Package Tracking. To check on the delivery status of your mailing, enter your tracking or confirmation number in the field below. The Confirmation Number is located at the bottom of a Stamps.com shipping label (circled in the diagram to the right). Do not include dashes or spaces. Please note that confirmation numbers are only retained for six (6) months.