Sharolyn Jackson's family mourned her at a funeral Aug. 3, KYW-TV in Philadelphia reported. Then last week, they learned the 50-year-old woman was at a psychiatric facility in the city.
Officials do not know whose body was interred at Colonial Memorial Park in Trenton, N.J. They plan to apply for an exhumation order.
A Philadelphia Health Department official said the body, found July 20, was released for burial after a social worker and Jackson's son identified her. But Jackson's father told KYW his grandson said he was given a black-and-white photo for the identification.
All that is known of the unidentified woman is that she died of natural causes.