Your invoice should reflect the following:

• Invoice number, billing date.
• Name, address, business or SS identification number
• Name of the project and producer (the one who hired you).
• Client’s purchase order or job number, if any.
• An itemized list of days that you worked, and the overtime hours if necessary.

Production companies and ad agencies are notoriously disorganized and your invoice can get lost in the sauce if you do not provide every detail possible.