You may place any non-certified item on extension to send for certification. You may send any previously certified item for recertification when previous cert is older than 7 years old. Otherwise, certified stamps are sold on the basis of certificate offered in listing. We prefer certs from: PSAG, PSE, APS, or PF, but allow you full discretion. Since some items are consigned, we ask for notice on intention to obtain cert within one week of receipt. We then offer a 45 day policy of return for refund from day of purchase. The item is refundable within this period, if the item is found to be other than as described. ("no opinions" don't qualify for refund) We do not pay for any certification and associated shipping costs. Item must be returned in same condition sold, and a photocopy of cert. w/ fault needs to be enclosed.