On July 29, 2026, FIFA opened disciplinary proceedings against Argentina's football association (AFA) and its players for several alleged breaches at the World Cup, notably the display of a banner asserting sovereignty over the Falkland Islands. Following Argentina's semi-final victory over England in Atlanta, some players held up a banner stating "Las Malvinas Son Argentinas" ("The Falklands are Argentine").

FIFA stated that using a sports event for demonstrations of a non-sporting nature could breach its disciplinary code. The organization previously fined Argentina £20,000 ($26,560) in 2014 for a similar incident involving a banner before a friendly match with Slovenia.

Additional alleged breaches during the tournament include discriminatory chants and gestures, late kickoffs, security protocol failures, inappropriate messages from teams and spectators, and objects thrown by fans across several matches.

Disciplinary proceedings were also initiated against several players following the final in New Jersey, where Spain defeated Argentina 1-0 after extra time. A brief altercation occurred at the final whistle when Argentina midfielder Leandro Paredes shoved Spain's Gavi to the ground as Spain's substitutes entered the pitch to celebrate. Paredes faces three assault counts, while Nahuel Molina faces two. Molina, Thiago Almada, Argentine official Roberto Ayala, and Spain's Gavi each face one count of unsporting behaviour.

FIFA said, "In accordance with the FIFA Disciplinary Code, the respondents have now been provided with the opportunity to present their position, following which a decision will be issued by the FIFA Disciplinary Committee in due course."