What assures a person that after paying for a product on Amazon, it is delivered?

After an order is paid for, Amazon sends the buyer an email confirming the purchase. In one to two business days, Amazon ships the product to the customer, and provides a tracking number, which can be used to keep track of the package's exact location and when it's delivered.

The carrier, ship date and estimated delivery date are also available through the provided tracking number. Some shipping carriers provide text updates, which notify the buyer via text message whenever their purchase is delivered. Additionally, "Fulfilled by Amazon" items guarantee reliable customer service product returns and full refunds directly through Amazon.