Here’s the official blurb from Coinstar:
Obtain an official claim form when you convert in a single transaction at least 30 U.S. dollars (in coins or cash) into an Amazon.com® gift certificate at participating Coinstar Centers. The claim form will be displayed at the end of qualified Coinstar receipts.
Complete the claim form in its entirety. An email address is required for electronic delivery of the $10 Amazon.com gift certificate.
Submit the completed claim form. Claims must be postmarked by 11/8/2007. Claims postmarked after the applicable date, incomplete submissions, and illegible submissions will be returned as ineligible.
Mail to “Coinstar GC Offer”, PO Box 91258, Bellevue, WA 98009. Receive the $10 Amazon.com gift certificate electronically. If a valid email address is not provided, it will be received by US Postal Service. Allow 6–8 weeks for processing. If terms and conditions are not met, the $10 Amazon.com gift certificate will not be sent. Coinstar is not responsible for any claims lost, damaged, or delayed in transit.
General terms and conditions:
The $10 Amazon.com gift certificate offer ends 11/4/07 or while supplies last. Offer valid at participating Coinstar Centers in the U.S. only and excludes Puerto Rico. Offer good on qualified transactions made between October 1, 2007 and November 4, 2007. Transactions occurring before or after these dates are not eligible for this offer. Limit 1 per name or household. Void where prohibited. Not valid with any other offer. No cash substitutions. Failure to follow the above rules may result in disqualification.