# Which Events Can Trigger Event Notifications?

OBS supports event notification for the following event types:

- ObjectCreated: Indicates all kinds of object creation operations, including PUT, POST, and COPY of objects, as well as the merging of parts.
  - Put: Creates or overwrites an object using the PUT method.
  - Post: Creates or overwrites an object using the POST (browser-based upload) method.
  - Copy: Creates or overwrites an object using the COPY method.
  - CompleteMultipartUpload: Merges parts of multipart tasks.
- ObjectRemoved: Deletes an object.
  - Delete: Deletes an object with a specified version ID.
  - DeleteMarkerCreated: Deletes an object without specifying a version ID.

Parent topic: Event Notification