Mormons are posthumously baptizing Holocaust victims as well as grandparents of public figures like Donald Trump, Hillary Clinton and Steven Spielberg, despite church rules intended to restrict the ceremonies to a member’s ancestors, according to a researcher who has spent two decades monitoring the church’s massive genealogical database.

The discoveries made by former Mormon Helen Radkey and shared with The Associated Press likely will bring new scrutiny to a deeply misunderstood practice that has become a sensitive issue for the church. The church, in a statement, acknowledged the ceremonies violated its policy and said they would be invalidated, while also noting its created safeguards in recent years to improve compliance.

Proxy baptisms are tied to a core church teaching that families spend eternity together, but the baptisms do not automatically convert dead people to Mormonism. Under church teachings, the rituals provide the deceased a choice in the afterlife to accept or reject the offer of baptism.