It’s possible to permit your clients to pay your invoices immediately, dropping the funds right into your PayPal account. In order for this to work, however, Blinksale must know the exact email address that is linked to your PayPal account.
Click on the Settings link at the top of the page, then click on Payment Gateways in the sidebar on the right. Type your PayPal email address in the box provided, then hit Save Settings.
Next time you want to add a PayPal payment link to an invoice, check the Include a PayPal payment link option that appears in the “Send Invoice” panel after you’ve hit Send Invoice.
When your client receives the invoice, she’ll see a Pay your balance with PayPal link which she can use to do just that. PayPal will even make note of the invoice number.