New York City Mayor Zohran Mamdani has asked state regulators to block Western Union's proposed $500 million acquisition of International Money Express, arguing the deal would harm immigrant communities who rely on affordable money transfer services. In a letter to the Department of Financial Services, Mamdani warned that combining two major players in the remittance market could lead to higher fees and reduced service quality for customers sending money to Latin America.

The acquisition, announced in August, targets mid-2026 completion pending regulatory approvals. Both companies operate extensive retail networks serving recent immigrants who lack traditional banking access, with remittances flowing billions annually to support families abroad. Western Union countered that the merger would enhance competitiveness against online-only rivals while maintaining affordable retail services, noting that physical locations account for roughly 60 percent of its revenue.

Mamdani's intervention reflects his administration's focus on affordability issues affecting immigrant communities. His connection to FTC Chair Lina Khan, who advised his transition team, adds regulatory expertise to the opposition. The mayor's stance represents unusual municipal involvement in antitrust matters, though state financial regulators hold approval authority over the transaction.

The dispute illustrates growing scrutiny of consolidation in essential financial services, particularly those serving vulnerable populations with limited alternatives.