What do I do if my client has no email address but wants me to send invoice by Royal Mail>

Hello Alison10, 

Thanks for reaching out to us on the Community page, 

If your client does not have an email address, you can always print the invoice off for them and then send it via Royal Mail, The way to do this is if you click into the invoices, at the bottom of the page in the black bar tab in the middle you will have a print or preview button > if you click that then print or preview again> it will load the invoice then click print in bottom right corner> this will print the invoice for you to send to them via post.