Yellow and red cards entered official use by match officials at the 1970 World Cup, marking the point at which football adopted a standardised visual system for disciplinary decisions on the pitch. Prior to that point, no on-screen tool existed to communicate to audiences whether a player had been dismissed or cautioned during play.
Referee Eduardo Varela stepped onto the pitch for the Copa AUF Uruguay round of 16 fixture between Nacional and Rentistas on 15 October 2026 carrying a handheld electronic device in place of the conventional card system, a departure from standard officiating practice at that level of the competition. Twelve minutes into the match, Rentistas midfielder Juan Pablo Plada became the first player to receive a digital yellow card after the referee penalised him for a foul on Maxi Silvera.
A joint undertaking between the Uruguayan Football Association (AUF) and a private technology company brought the platform to life. Built to serve as an all-in-one control point for running matches, the device brings together every aspect of game management in a single platform.
These updated cards are housed within a device that bears a strong resemblance to a smartphone. Two physical controls built into the unit allow an officiating referee to switch the screen between a yellow glow and a red one, each colour communicating a distinct level of disciplinary action to players on the field.
Refereeing official Marcelo De Leon has outlined a target of delivering match data in real time — first to the sport's governing body, then onward to media organisations worldwide. Provided the infrastructure rolls out consistently across Uruguayan football, referees, administrators, and media outlets would have access to real-time records of every booking, substitution, goal, and penalty the moment each event occurs.
Offline operation — the ability to process transactions without relying on a WiFi network — sits at the heart of how the card reader was engineered. Venues with patchy or absent connectivity, including outlying stadiums and lower-tier fixtures, remain within its operational reach.
Questions about how well the digital cards show up across varying light conditions were put forward by both observers and officials. In a fixture between Defensor Sporting and Plaza Colonia, bright sunlight fell directly across the display panel, reducing its readability for anyone positioned at a distance. Spectators inside the ground and those watching the Nacional–Rentistas night fixture on television noted that the kit colours appearing on screen were harder to distinguish than the standard yellow and red card tones referees typically brandish.
