Baptism and temple rites were performed for Barack Obama's mother last June.
Records on FamilySearch.org, the LDS Church's genealogical site, clearly show that Stanley Ann Dunham received proxy rites in the Provo temple on June 4 and June 8 of 2008. The birth and death dates of the person for whom the rites were performed match those of Obama's mother.
Dunham's name has been submitted multiple times by at least three people in three states.
“The offering of baptism to our deceased ancestors is a sacred practice to us and it is counter to Church policy for a Church member to submit names for baptism for persons to whom they are not related," Scott Trotter, spokesperson for The Church of Jesus Christ of Latter-day Saints, said in a statement. [Link]