Unrecognized documents in iCloud

Hey there and welcome to Apple Support Communities CarbonCashback,

We can certainly understand your concern and are here to help.

We recommend checking out this link for more information on how to manage your iCloud storage in order to free unwanted data in your account.

Manage your iCloud storage - Apple Support

We also recommend checking out this link for more details on how to check your Apple ID device list to find where you're signed in. This way you can determine if the documents are from someone else.

Check your Apple ID device list to find where you're signed in - Apple Support

If none of these articles help resolve your issue. Then contacting Apple directly will be the next best step.

Get Support

These steps will help ensure your device is working with ease and can fix common issues like the ones you’re experiencing.

Kindest regards!