In a sign that the entire foreclosure process is coming under pressure, a second major mortgage lender said that it was suspending court cases against defaulting homeowners so it could review its legal procedures.

The lender, JPMorgan Chase, said on Wednesday that it was halting 56,000 foreclosures because some of its employees might have improperly prepared the necessary documents. All of the suspensions are in the 23 states where foreclosures must be approved by a court, including New York, New Jersey, Connecticut, Florida and Illinois.

The bank, which lends through its Chase Mortgage unit, has begun to “systematically re-examine” its filings to verify that they meet legal standards, a spokesman, Tom Kelly, said.

Last week, GMAC Mortgage said it was suspending an undisclosed number of foreclosures to give it time to take a closer look at its own procedures. GMAC simultaneously began withdrawing affidavits in pending court cases, throwing their future into doubt.