When you get married do you tip the person officiating the wedding?
Highly culturally dependent, among Orthodox Jewish circles. In some places it is considered one of the standard roles of a synagogue Rabbi to officiate at congregant weddings, and there is a standard amount given (which is as much a part of the Rabbi's salary as it is a "tip"). It would be a big breach to have an outsider officiate in those circles. In other circles, it is a big honor given to the rabbi most influential in the groom's life, or a reverted relative. It would be considered quite rude and insulting to give a tip or payment in those circles.