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In one of those suits, David Peterson of Grain Valley, Mo., says Chase Home Finance assured him in December of 2008 that he qualified for a loan modification and would soon receive the papers in the mail. The offer was not under the government program, which didn’t launch until April 2009.

When the papers had still not arrived a month later, he says, he called to ask whether he should send in a payment. He was told to wait, the suit says, and was assured he would not be foreclosed on.

Nevertheless, Chase sold his home. More than three weeks later, Peterson says he received the modification papers in the mail. They were dated one day after the foreclosure had occurred.

Chase refused to reverse the sale, according to the suit, which was filed last month. Chase declined to comment on pending litigation.