To find Subway stores surveys online, visit Subway.com and navigate to the heading "Local Store Feedback" under Contact Us. Alternatively, go directly to TellSubway.com. To begin the survey, enter the Subway store hash tag written at the top of your receipt.
The TellSubway.com site offers guidelines for users in finding a store's hash tag on a variety of receipts. The online survey takes about 60 seconds to complete. As of July 2015, U.S. users that complete the survey within 30 days of their visit to a Subway store are eligible for a free cookie.
Subway stores and restaurants are run by over 21,000 franchisees in more than 100 countries around the world.