Mail My Doc by Click2Mail Google Add-on orders are paid for with user credit that is purchased on the Click2Mail website. There are several ways to fund your account with user credit.
You can log into www.Click2Mail.com. After logging in, access your account dashboard and purchase user credit.
If you are working in a Google doc and logged into your Click2Mail account, you can add funds through the Mail My Doc Add-on. Click "Add-ons", select "Click2Mail" and then click "Account Balance".
Click "Add Funds" to continue on to your Click2Mail account dashboard.
You can also add credit during the order process. When approving your order, click "Add Funds". You will then log in to your Click2Mail account and be able to add user credit.