You may cancel within 10 days after your purchase and get a refund back to your paypal account.
Directions:
You fill up the form and click "Continue" button. Then system asks you to confirm your action.

You click "Confirm" button and being redirected to PayPal, where you can pay for certificate(s).

After successful payment you receive e-mail (it is sent to your PayPal e-mail address) which contains link to printable gift certificate.

You click this link and see printable gift certificate(s),

You print this certificate and bring the ticket to Nostos Restaurant.