PECB holds a no-refund policy on services purchased: Certification of Persons. If a purchase is made by accident due to not carefully following instructions sent by PECB on using a Coupon Code and/or by overfulfilling the amount required, we recommend you to contact PECB at customer@pecb.com no later than 30 days after the payment is made, so we can use it as a credit note for your future payments (maintenance fees, additional certificates, etc.).