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Many protocols are acknowledgement-based, meaning that they positively acknowledge receipt of messages. The internet's Transmission Control Protocol (TCP) is an example of an acknowledgement-based protocol. When computers communicate via TCP, received packets are acknowledged by sending a return packet with an ACK bit set. [3]
In some countries, it is obligatory for a business to provide a receipt to a customer confirming the details of a transaction. In most cases, the recipient of money provides the receipt, but in some cases, the receipt is generated by the payer, as in the case of goods being returned for a refund. A receipt is not the same as an invoice. [6]
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Registered mail is a postal service in many countries which allows the sender proof of mailing via a receipt and, upon request, electronic verification that an article was delivered or that a delivery attempt was made. Depending on the country, additional services may also be available, such as:
In one common scam, you might receive a receipt and shipping confirmation for an Amazon order you never placed. Another type of email scam involves notifying you of a problem with your Amazon ...
complete, sign, and return this legal dispute form and expect to hear back from us within 60 days of receipt of completed form. mail the form to oath inc., dept. 5771, po box 65101, sterling, va, 20165-8806.
This scam involves a deceptive email that appears to be from Home Depot with such wording as "Confirmation needed: please confirm receipt." The email body typically contains enticing text like ...
A non-standard but widely used way to request return receipts is with the "Return-Receipt-To:" (RRT) field in the e-mail header, with the email return address specified. The first time a user opens an email message containing this field in the header, the client will typically prompt the user whether to send a return receipt.