Quote: “One of the core tenets of Mormon faith is that the dead can be baptized into the faith after their passing. Baptism of the dead evolved from the beliefs that baptism is necessary for salvation and that the family unit can continue to exist together beyond mortal life if all members are baptized.”
=> The Mormons via Beck want access to the data.
It may be a quote; but it's not quite accurate...
Baptisms for the dead are performed by Church members in temples throughout the world, and are conducted as living people are baptized in the names of deceased individuals.
We believe that deceased persons, as they now dwell as Spirits without a body, may each personally accept or deny their proxy baptism, as they choose.
More 'testimonies' --> https://www.mormon.org/searchresults#?query=baptism%20for%20dead&filter=site
Even more stuff --> https://www.lds.org/search?lang=eng&query=baptisms+for+the+dead+scripture