You can download a copy of your GoCanvas invoice from the Account area if you have the role of Admin.
You can also email a PDF of your invoice directly from the GoCanvas website. This means you do not have to download it, save it and then attach it to an email.
When logged in to GoCanvas click on Home, then Account and then Billing Info.
In the Invoice History area in the Actions column, you can click the PDF icon to download the PDF. If you click the envelope icon you will then be allowed to enter an email address. That person will receive an email with the PDF attached to it. That email will indicate who sent it, too. It will include the contact information associated with the Admin account that you're logged in with.
Enter an email address and push Send to Recipient.
Here is the email that your recipient will receive. Your name, company name, and email address will appear in the signature at the bottom of the email.