If you are permitted to submit your invoice via email then it is useful to convert the invoice into PDF format so that it cannot be altered. There is a free PDF creator which you can use at PDFCreator. This creates a PDF file from any application which can then be emailed to the client. Better off, if you can use a software system, it will automatically generate invoice in PFD format, you can also email it straight away from within the a software program.
Your invoice should be prompt, so that you can get paid by your clients on time, while invoicing is not a fun task, it's a necessary one: by keeping clients informed of your expectations, you will get paid punctually and reinforce your professionalism. After going over some best practices for creating invoices, I will review some great (and not so great) invoicing practices, so that you can spend less time creating invoices and more time doing the things you love! So here are some general guidelines, best practices and examples that will help you make sure your invoices are up to specification.