> For the complete documentation index, see [llms.txt](https://docs.artinals.com/artinals-protocol/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.artinals.com/artinals-protocol/art20/functions-and-entry-points/openapi-5.md).

# Deny List Mechanics and Authority

**`initialize_deny_list(collection_cap)`**: Sets up a deny list for a collection.

**`add_to_deny_list(...)` / `remove_from_deny_list(...)`**: Manage addresses on the deny list.

**`revoke_deny_list_authority(...)`**: Revokes the ability to modify the deny list.

**`is_denied(...)` / `can_receive_art20(...)`**: Check if an address is allowed to receive NFTs.