When creating a challenge, the Matter admin has the option to require team members to submit evidence as part of their claim submission.
If enabled, users must submit a file (2MB max) with their challenge claim. This file is typically an image, a PDF, etc. Award Manager(s) have the ability to download this file to review when determining whether to approve or decline a challenge claim.
Submitting a Challenge Claim in the Web App
Open the Web App, and go to Challenges.
Under the respective challenge, click Claim.
Then add in a Claim Explanation and if required, upload Claim Evidence (e.g., image, PDF, etc.) and click Claim.
