With your fingers on a keyboard.
Include: Their name and address
Your Name and Address
Describe the item/s or service/s you're invoicing for.
State the agreed price in a right hand column
Itemize cost of any any added service required (i.e. delivery)
Itemize any statutory tax or fee you need to charge (i.e. sales tax)
Include any statutory details required (such as business license or tax registration numbers)
State when payment is due (i.e. 30 days or Cash on delivery C.OD.)
(Add a reference for your own records i.e. Invoice No. 1)
Total the amounts to provide a single clear Due amount you are owed
Present the bill