Just an example, there is no specific format for invoice, as long as it has product description, quantity and price. Particularly, when you don't have original receipt or invoice from vendors or sellers, you may use this one.
If your order is from Amazon, you can obtain the invoice from Amazon.
How to copy invoice from Amazon
(Similar with other websites such eBay, Walmart, Target)
To view a printable version of any invoice from Amazon:
Log in your Amazon account.
Find the order you placed. For the order, you can find the order details. On the top right, there is a button “View or Print Invoice”.
Click it, a new window pops up. Copy and paste it to a word file.
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