NEW YORK: Citigate Sard Verbinnen and Joele Frank, Wilkinson Brimmer Katcher are in the middle of a shopping-mall stand-off that has nothing to do with last-minute holiday shopping.

The two financial communications firms are on opposite sides of the hostile-takeover battle between mall landlord giants Taubman Centers and Simon Property.

Simon is attempting to snatch up Taubman, which appears especially vulnerable with Taubman family patriarch Al Taubman currently in jail for his role in an auction-house price-fixing scheme from when he was ...