The deadline for retailers to submit claim forms in the Visa Check/MasterMoney antitrust class action lawsuit is Wednesday, December 28, 2005. Class members -- retailers that accepted Visa and MasterCard debit cards between October 25, 1992, and July 31, 2003, have until then to return the forms, which were mailed to them at the end of September. December 28 is also the deadline for retailers to challenge the estimated cash payment amount on the claim form.