An invoice is prepared whenever you need to bill a customer for goods or services that they have purchased from you.
You can buy generic pre-printed invoice books at the stationery store, or you can design your own and have them custom printed at your local print shop with your own corporate information included in the letterhead.
The sample invoice below was set up in the MS-Word word processing program and contains all of the key information elements that should be included on a standard business invoice.
I have frequently sent this type of business invoice, both in printed form via standard business mail, or as an attachment to an e-mail. Both forms worked very well for me.
Business Invoice – Sample Format