> For the complete documentation index, see [llms.txt](https://size.club/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://size.club/docs/help/fair-play.md).

# Fair play

Size measures how you trade. That only works if everyone plays their own game. The rules below are enforced, and breaking them can void results, earnings, and eligibility under the [Terms of Service](https://www.size.club/legal/terms-of-service.pdf).

## The rules

1. **One account per person.** Operating multiple or linked accounts is prohibited.
2. **You must be 18 or older**, and Size is not available in every country. See the [restricted jurisdictions list](https://www.size.club/legal/restricted-jurisdictions.pdf).
3. **Play your own runs.** Bots, scripts, and automation of any kind are prohibited in Trials and on Lives. The engine grades a human, not a machine.
4. **No self-referrals.** Referring yourself, your household, or accounts you control voids the rewards. Farmed referral cohorts disqualify the referrer.
5. **No exploit farming.** Abusing a bug or loophole instead of reporting it can void results. Report it instead: use the bug icon in the nav, and accepted reports earn XP and achievements.

## Campaigns and prizes

Preseason and future campaigns apply these rules with teeth: proven multi-account abuse zeroes campaign eligibility, and top finishers are reviewed before prizes pay.

## How it is enforced

Detection runs on the same data that powers scoring, and it is good. The specifics stay private for the same reason [the formula does](/docs/playing-a-trial/why-the-formula-is-private.md).

Play it straight and none of this page concerns you.

## Related

* [Prize pool and ranks](/docs/progress-and-preseason/prize-pool-and-ranks.md)
* [Referrals](/docs/compete-and-connect/referrals.md)
* [Legal](/docs/help/legal.md)


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