On 9 December 2022, CONMEBOL announced a total of 11 referees and 22 assistant referees appointed for the tournament, included a Portuguese refereeing team. For the first time, a
UEFA refereeing team will participate in the South American U-20 Championship as part of the
UEFA–CONMEBOL memorandum of understanding signed in February 2020, which included a referee exchange programme. Portuguese referee
João Pinheiro was replaced by his fellow countryman
António Nobre. •
Nicolás Lamolina • Assistants: Maximiliano Del Yesso and Facundo Rodríguez •
Ivo Méndez • Assistants: Ariel Guizada and Carlos Tapia •
Braulio Machado • Assistants: Fabricio Vilarinho and Rafael Alves •
Cristian Garay • Assistants: Claudio Urrutia and Alejandro Molina •
Carlos Ortega • Assistants: Jhon León and John Gallego •
Guillermo Guerrero • Assistants: Ricardo Barén and Dennys Guerrero •
Derlis López • Assistants: Roberto Cañete and Luis Onieva •
Augusto Menéndez • Assistants: Stephen Atoche and Leonar Soto •
António Nobre • Assistants: Bruno Alves and Luciano Maia •
Gustavo Tejera • Assistants: Andrés Nievas and Horacio Ferreiro •
Yender Herrera • Assistants: Lubin Torrealba and Alberto Ponte ==Squads==