Discord error 10007: Unknown member

The user exists on Discord, but is not a member of the guild you named. This is the code you get when you try to kick, timeout, assign a role to, or fetch a member who has already left, was banned, or was never in the server.

It is distinct from 10013 Unknown user, which means the user ID does not exist anywhere on Discord. 10007 is scoped to a guild: the same user ID will succeed in one server and fail with 10007 in another.

Member-related operations are also affected by the Server Members privileged intent. Without it, your library's member cache is mostly empty and a cache lookup returns nothing; that is a library miss, not a 10007 from the API. But if your code then calls the API with a guessed or stale ID, you get 10007 for real.

{
  "message": "Unknown Member",
  "code": 10007
}

Model membership as transient. Any action that targets a member should tolerate 10007 as a normal outcome (log, notify the moderator, move on) rather than as an exception that crashes a handler. Where you need a reliable member list, enable the Server Members intent and rely on GUILD_MEMBERS_CHUNK rather than ad-hoc fetches.

Moderation flows that survive member churn are mostly about ordering: verify membership, act, then confirm. The member-list pagination caps that shape bulk checks are on the Discord limits page, and the ban-instead-of-kick fallback above pairs with 40007 when the target is already banned.