Former Birmingham co-owner David Gold has been banned from the directors box and boardroom at St Andrew's for the clash with his current club West Ham.
Birmingham have taken the stance in response to Gold's comments in the Birmingham Mail about the club he was in charge of for 16 years along with David Sullivan.
Gold described current City vice-chairman Peter Pannu as "disgusting" in the article.
Gold claimed he was denied the chance to remain as chairman of Birmingham by Pannu after he and Sullivan sold the midlands club to Carson Yeung for £8.5million.
Pannu has been adamant Gold was never guaranteed such a role and he later rejected the chance to be a vice-president.
City have sent a letter to West Ham saying Gold will not be welcome in the directors box or boardroom after his remarks.