Certification Logo Expiration

The GRA certifies restaurants in relationship to their environmental sustainability. When the restaurant meets the certification standards, we send them our logo to use on their website, e-newsletters, menus, etc. If a restaurant falls out of compliance, we want the easy ability to revoke their use of the certification logo. We'd like to have the ability to have their logos expire if they are no longer in compliance with our standards. Our website is [login to view URL] I look forward to your bids. Our logo is on hundreds of websites. Thanks.