When you have completed a job the first thing you should do is to write an invoice – keep that money coming in! With a lot of theatrical productions and events, it is common that the accountants from a show will want to close the books soon after it is finished so you must send your invoice straight after a job to ensure swift payment.
Below are some example invoices which you may want to look at to give you an idea of how to include all the relevant information and make it look professional. If you are emailing an invoice you should try to save it as a PDF or as a Protected File so that it cannot be tampered with. The more professional you look and the easier you are to communicate with admin-wise, the more likely you are to get paid quicker and be booked regularly (along with your technical skills of course!).