[Wilford Woodruff to Logan temple president Marriner Merrill]
... We must be more strict in enforcing the rule which is here mentioned in regard to heirship in our Temples, and people must not be permitted to follow their whims in being baptized for any and every body whom they may choose to officiate for; and persons should be questioned upon this subject of being baptized for those not of their own kin. We are satisfied that no man has a right[,] outside of his own kindred[,] to attend to ordinances for the dead without consultation and permission from the Presiding authority of the Church. But as this, perhaps, would lead to great delay and large correspondence, you as President of the Temple are authorized to exercise a wise discretion in permitting persons to be baptized for friends, when they satisfy you that they have no representative in the Church.
[Source: Wilford Woodruff to Marriner Wood Merrill, Sept. 5, 1887, in Anderson, Devery; The Development of LDS Temple Worship, 1846-2000: A Documentary History, http://amzn.to/TempleWorship]