WADA set up a three-person independent commission in December to investigate allegations made in a German television documentary of widespread doping and coverups in Russia, particularly in track and field.
WADA says on its website that is "encouraging you to contact us, in confidence, to share information related to the allegations or any other doping suspicions or concerns."
The agency attached a secure online form for users to send in their information. The notice is also included in Russian.
The WADA commission, headed by former president Dick Pound, is scheduled to deliver its findings by the end of the year.
On the web: https://www.wada-ama.org/en/report-doping/