Walter Investment Management recently reorganized its servicing operation, formerly known as Green Tree, and its production unit as Ditech Mortgage, and other nonbanks may be looking for a new identity as well. Nationstar recently trademarked the name “Mr. Cooper,” but the company isn’t giving out much information on the topic. According to a spokesman, Nationstar has trademarked “a couple of names” for “non-specific possible future uses.” However, one source close to ...