Under Indonesia’s strict drug law, Gregor Johann Haas could face the death penalty by firing squad.
Payne Haas’ club, the Brisbane Broncos, said it was aware of the matter.
“We will support Payne in whatever way he needs,” media officer Steele Tallon told AAP on Friday evening.
The 24-year-old is rated one of code’s elite players, winning Brisbane’s player of the year award five years running and starring during the side’s charge to the 2023 grand final.
He has represented NSW in State of Origin 11 times and played for Australia in four tests. His younger brother Klese is a rising star with cross-town rivals Gold Coast.
Police last month withdrew charges against another sibling, Zeda Haas, over the alleged supply of almost 2kg of methamphetamine in the NSW Hunter region.