What Goes in a Proper Invoice?

When I first started contracting, I was amazed at the amount of paperwork stuff I had to figure out. Frankly, I just wanted to get paid. So in that vein, for those of you have sent the following type of message: Dear Client, Where is my money – its been over a month? – xoxo Contractor and recieved the following in response Dear Contractor, Upon reviewing your invoice, we noticed you are missing everything except …