> For the complete documentation index, see [llms.txt](https://polymarketguide.gitbook.io/polymarketguide/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://polymarketguide.gitbook.io/polymarketguide/resolution/how-to-participate/verify/guidelines.md).

# Guidelines

Consider the following guidelines when verifying.

### Check the resolution source

Make sure the **evidence matches the resolution source**. 

*Example:* In *2026 NBA Champion*, the resolution source is information from the NBA. Evidence from outlets such as ESPN would not count.

<figure><img src="/files/rUdOPrK3XEL0ZlfhZ0Wz" alt=""><figcaption></figcaption></figure>

### Review proposals that are about to finalize

Prioritize reviewing proposals whose **challenge periods are about to end**.

*Example:* In the UMA Oracle, prioritize proposals with less time remaining in their challenge period over those just submitted.

<figure><img src="/files/a2MhwCfnYCj3oKMx2PEJ" alt=""><figcaption></figcaption></figure>

### Collaborate with others

Verification is a **team effort.** Work with others to determine whether a proposal is accurate. By collaborating, you can **learn from experienced verifiers** and markets you may be unfamiliar with.

*Example:* In *Any Tesla arsonist found guilty in 2025?*, several users collaborated by reviewing court documents to confirm whether a Tesla arsonist had been found guilty.

<figure><img src="/files/RgcrdyMF4IWsrEUPYuGi" alt=""><figcaption></figcaption></figure>