Kevin Hill came out top in the Twitter competition run by the club's official legal partner, but instead of keeping the shirt himself has given it to Help Harry Help Others.
The shirt will be used to raise funds for the club's official charity partner HHHO, as well as another charity close to Kevin's heart that helps families affected by Angleman Syndrome - a rare genetic disorder.
Kevin said: "My son Joshua passed away two years ago aged just 14 from Angleman Syndrome. He couldn't talk but signed and was constantly smiling.
"After lots of soul-searching I discovered Georgia Moseley and her charity Help Harry Help Others which was set up in Harry's memory. Georgia has been a true inspiration to not only me but also to other families that have suffered losses.
"When I won the signed Birmingham City shirt from blues legal I decided to donate it so that it could be used to raise money and awareness of not only Help Harry Help Others, but also Angleman Syndrome. The money raised will be split equally between the two charities."