I know it's a little hard to read on the scan so here is a transcript.
Congratulations! You have received a "Redemption" card for an authentic autographed trading card from the 1999 MLB SP Signature Edition set.
To receive your card, simply send this card along with your name, address, (No PO Boxes) and telephone number to: The Upper Deck Company Attn: Redemption Manager, 1999 MLB SP Signature Edition Offer, 6909 Sea Otter Place, Carlsbad, CA 92008. For insured delivery, please enclose a check or money order for $4.00 (US funds).
Upper Deck nor any of its agencies are responsible for lost, late, damaged, misdirected, incomplete, illegible, or postage due mail. This redemption card will not be returned. your redemption card must be postmarked by 5/12/00 and received by 5/19/00. Please allow 4-6 weeks for delivery.