Standard Chartered Plc might be asked to pay as much as $700 million to resolve money-laundering allegations filed by New York’s banking superintendent after his department grew impatient with inaction by federal regulators, a person familiar with the case said.

Benjamin Lawsky, who heads up New York’s Department of Financial Services, tried unsuccessfully a few months ago to get U.S. regulators to punish the London-based bank for conduct involving disguised Iranian money transfers, said the person, who asked not to be identified because the matter is confidential. The transfers have been under investigation by federal agencies for more than two years, according to Lawsky’s Aug. 6 order.