Careful consideration and approval
Deaccessioning also must consider how the objects came into the collection. If an artwork was donated to the museum, it is often done so with implicit or explicit trust that the artwork will always stay in the museum's collection. Therefore, most museums prohibit removing donated artworks from their collections.* If there are any other implications, the museum is legally not allowed to sell the work of art.
Sometimes, donors will specify that their gifted artworks may be sold, but all funds earned must be used to buy more art of a similar style. An example of this is:
Betye Saar
Ancestral Spirit Chair
1992
painted wood branches, glass, bones, plastic, metal, and dried creeper vine
60 x 46 x 32 in
Purchased with the proceeds from the sale of a work donated by Mr. and Mrs. Alexander Rittmaster (Sylvian Goodkind, class of 1937) in 1958 and with funds realized from the sale of a work donated by Adeline Flint Wing, class of 1898, and Caroline Roberta Wing, class of 1896, in 1961, 1992:42a-c