GMAC mortgage says it has spent more than $1.5 million to recover and transfer foreclosure files previously handled by the Plantation-based Law Offices of David J. Stern, which the lender fired in November.

The dollar figure is listed in a counterclaim filed by GMAC last month against Stern, who is suing to collect back fees for work the firm did on GMAC foreclosures.

But GMAC says the firm’s work was so flawed _ even charging legal malpractice _ that new attorneys assigned the cases were forced to re-initiate foreclosure proceedings due to concerns over documents previously filed by Stern’s firm.

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