Sadly not all Relays will adopt deletion of posts.

Zepasta

nostr

Nostr is private, or is it?

kenn_b

The nostr protocol has an improvement proposal (NIP-09) that touches on Event Deletion (Kind 5).
[https://github.com/nostr-protocol/nips/blob/master/09.md](https://github.com/nostr-protocol/nips/blob/master/09.md)

Nostr kind 5 is a best effort approach and relies on both the client and the relay on observing the protocol rules. 
It is by no means perfect. Nothing is.

It will not save you in court.

It is no different to Facebook or Twitter deleting your posts on request but storing a backup on file.

[https://delete.nostr.com](https://delete.nostr.com) is a tool that uses NIP-09 (Kind 5) to `delete` nostr notes.