thank them the donor

Donor Honored
In 2006, an anonymous donor stepped in and contributed $500,000 to save the historic Joy Kogawa House, at 1450 W. 64th Avenue. Today, the Land Conservancy of B.C. has scheduled an event to publicly thank them the donor.
-- local news IN BRIEF in 24 Hours Vancouver, Friday April 25th 2008

Get rid of either the donor or, preferably, them.