Some homeowners say the banks tried to foreclose on a house that did not even have a mortgage. Others say they believed they were negotiating with the bank in good faith. Still others say that even though they are delinquent on their mortgage payments, they deserve the right to due process before being evicted.

Some consumer lawyers say they are now swamped with homeowners saying they have been wronged by slipshod bank practices and want to fight to keep their homes. Joseph deMello, a Massachusetts lawyer who represents Mr. Rought, said the common denominator in many of the cases was an overwhelmed system of foreclosures in which banks relied on subcontractors to do much of the work.

“No one double-checks anything,” he said. “It’s completely high volume and that’s unfortunately what leads to this.”

It may never be known how many homeowners have legitimate claims against the banks, real estate and banking experts say, because lenders do not release such data and because the vast majority of cases never make it to court.

For the last month or so, some of the nation’s largest banks have temporarily halted foreclosures in some states amid accusations that the paperwork used as evidence to oust homeowners was incomplete or signed off by so-called robo-signers who did little to check its veracity.