Just when you thought it couldn't get any worse, it does. But hey, isn't it great that lobbyists have managed to prevent Congress from letting bankruptcy judges lower mortgage payments? Win-win!

SOUTH BEND, Ind. — Mercy James thought she had lost her rental property here to foreclosure. A date for a sheriff’s sale had been set, and notices about the foreclosure process were piling up in her mailbox.

After Ms. James had her tenants move out, vandals hit the home. It is set for demolition, but the title is still in her name.

Ms. James had the tenants move out, and soon her white house at the corner of Thomas and Maple Streets fell into the hands of looters and vandals, and then, into disrepair. Dejected and broke, Ms. James said she salvaged but a lesson from her loss.

So imagine her surprise when the City of South Bend contacted her recently, demanding that she resume maintenance on the property. The sheriff’s sale had been canceled at the last minute, leaving the property title — and a world of trouble — in her name.

“I thought, ‘What kind of game is this?’ ” Ms. James, 41, said while picking at trash at the house, now so worthless the city plans to demolish it — another bill for which she will be liable.

City officials and housing advocates here and in cities as varied as Buffalo, Kansas City, Mo., and Jacksonville, Fla., say they are seeing an unsettling development: Banks are quietly declining to take possession of properties at the end of the foreclosure process, most often because the cost of the ordeal — from legal fees to maintenance — exceeds the diminishing value of the real estate.

The so-called bank walkaways rarely mean relief for the property owners, caught unaware months after the fact, and often mean additional financial burdens and bureaucratic headaches. Technically, they still owe on the mortgage, but as a practicality, rarely would a mortgage holder receive any more payments on the loan. The way mortgages are bundled and resold, it can be enormously time-consuming just trying to determine what company holds the loan on a property thought to be in foreclosure.

In Ms. James’s case, the company that was most recently servicing her loan is now defunct. Its parent company filed for bankruptcy and dissolved. And the original bank that sold her the loan said it could not find a record of it.

“It is what some of us think is the next wave of the crisis,” said Kermit Lind, a clinical professor at the Cleveland-Marshall College of Law and an expert on foreclosure law.