Not a whole lot to say here that wasn’t already said in our discussion of business cards.
Except this. A lot of the people who either throw away or lose your business card will hang on to an invoice for several years. The Internal Revenue Service has trained us well.
Several months down the road, when the client needs you again or his boss at work is looking for something really special, that invoice will be pulled from its file and put back to work. That being the case, you want to treat your invoice the same way you would treat any other piece of marketing.
Because that’s exactly what it should be.