Here is the response I got back :
Thank you for your e-mail to Costco Wholesale.
This item does not fall under the 90 day return policy.
We guarantee your satisfaction on every product we sell with a full refund. Exceptions: Televisions, projectors, computers, cameras, camcorders, iPOD / MP3 players and cellular phones must be returned within 90 days of purchase for a refund.
We offer two convenient return options. Costco.com refunds include shipping and handling fees.
1. For an immediate refund, simply return your purchase to any Costco location. To find a location, please click http://www.costco.com/Warehouse/Locator.aspx
2. Or, you may reply to this e-mail if you are unable to return the product to the nearest Costco location due to product size and weight. Please include your name, order confirmation number, phone number, and the reason for the return. You will be contacted regarding your return within 5 to 7 business days.
Costco Wholesale Corporation
It would appear that, by extrapolation, that they would refund the full cost if the receiver went belly up.