The investors claim that Ocwen performed worse than other servicers each year from 2009 through 2013 and that the trusts suffered losses of more than $1 billion because of the company’s deficient performance, according to a copy of the notice reviewed by Reuters. The investor group’s claims stem from its special interests and are not in the best interests of the trusts as a whole, a lawyer for Ocwen said in a letter dated Jan. 26.