Retailer groups opposed to Visa Inc. and MasterCard Inc.'s $7.25 billion settlement of a lawsuit over merchant credit-card fees said they have garnered support from about 1,200 businesses covered by the deal.

Trade associations including the National Association of Convenience Stores, the National Community Pharmacists Association and the National Restaurant Association urged U.S. District Judge John Gleeson in Brooklyn, New York, not to grant initial approval to the settlement, according to objection papers the parties are preparing to submit.

The settlement, estimated to cost the card companies and major banks as much as $7.25 billion, would cover about 7 million retailers nationwide. In an order filed Oct. 24, Gleeson said he will probably approve the deal. That could end about seven years of litigation over an alleged conspiracy by the card companies and banks to fix the so-called interchange fees that retailers are charged when customers pay with cards.