Initial foreclosure filings are on the rise in South Florida, a sign that lenders appear to be working through processing delays caused by the “robo signer” controversy last fall.

So-called lis pendens soared by 71 percent across Palm Beach County in April from a month earlier, according to RealtyTrac Inc., an Irvine, Calif.-based listing firm. Broward’s lis pendens rose 13 percent over the same period.

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