so heres the deal, i have a small scale landscaping company that consists of myself and my brother. we work under the table and receive payment directly from out clients upon completion of the task, usually as a check. ive just gotten a call from a real estate agent who wants me to do a weekly mow on one of their houses - however, he gave me an address to bill. i have never made an invoice/bill and am not exactly sure as to what to put on it aside from payment due billing address etc. can anyone fill me in as to exactly what is on an invoice?