Until the end of April of the current race year you may login to your runsignup account and transfer your entry to another athlete . This is the only approved transfer process and insures athletes are properly accounted for in the appropriate age groups as well as properly registered in the event of a medical emergency where they may become unable to communicate with the first responders.
Please be aware giving or selling your bib outside this approved transfer process will result in being banned from the race for life.
Complete details and instructions can be found on http://buffalomarathon.org