Confirmations and Invoices[/b]
I had a whole class on this for illustrations.
Confirmations:Contract used by an artist when no purchase order has been given or when the purchase order is incomplete with respect to important terms of the contract, such as amount of fee, rights transferred, and so on.
(page 349, Pricing & Ethical guidelines)Sample:
http://i.imgur.com/hIOf96j.jpgYou should not start the project until you get your conformation back with the authorized signature because if you start and they don't agree upon the terms you may have just wasted time.
Tip:
Don't start "Client't job number" as 00001 or else it become too obvious that this is your first job and they may become hesitant on signing it or ask to lower your price, but also dont make up a random "askjeoag" in where you wont be able to organize any other job confirmations you have.
InvoiceStatement Given to a client showing he amount due in payment for an asignment. Usually submitted after work has been completed. If advance payments are made, the invoice should reflect these and show the balance due.
(page 351, Pricing & Ethical guidelines)Sample:
http://i.imgur.com/itIMO5f.jpgThis form tells that you fulfilled your end of the bargain and how much it cost you to do it which should be the amount they should pay you. Expenses don't include things you already own but things you had to gain to use the project.
Ex. If you already owned oil paints you can't charge for uses them, but you can charge if you had to buy them, because you would require you to make a copy of the receipt as proof.
Tip:
Best thing to do if you had done a traditional piece is to tape the on the back of your work as you mail it so they can see it along with an email. As for traditional you should Email them a copy of your invoice as well as mail them a copy.