Original Post — Direct link
As is usual with TrackMania, someone has to do the job of starting a megathread dedicated to reporting cheaters and hacked records, so I thought I'd get started.

Straight away there's a cheated world record on Summer 2020 03:

Login: lilaux77
Time: 13.054

Clear 5 seconds ahead of the legitimate world record, uses some kind of teleport hack to skip half the course and jump straight to the end.
over 3 years ago - Ubi-Milky - Direct link
Hello everyone, thank you for your help in reporting cheaters to us and the Nadeo team during the release of the game and release of matchmaking.

Going forward, we would prefer if you can contact us over the following support links for any reports of cheaters you encountered in game -

Twitter Support - https://twitter.com/UbisoftSupport
Facebook Support - https://www.facebook.com/UbisoftSupportUK/
Ubisoft Support Website - https://support.ubisoft.com/en-gb/Cases/New

When you contact us, please make sure to provide the following information -

- Your Ubisoft ID
- Name of player you are reporting
- Date and time of match
- Any clips you might have captured, that clearly demonstrates cheating

Naming and shaming is against the forum rules and we are making a change in game, so that when you use the 'Report A Player' tool in-game, you should come through to our support site instead, where previously you would be redirected to the forum. This way we can make your reports private instead going forward and remove openly accusing others players who could turn out to be innocent, on the forums, thank you.