# Sender Unknown achievement

> Find scattered letters in the Cave of Sin. In Lost Ark, Sender Unknown belongs to the Adventure achievement category.

Canonical: https://lostark.wiki/database/achievements/sender-unknown-1010016

## Objectives

1. Old Note #1
2. Old Note #2
3. Old Note #3
4. Old Note #4
5. Deleted Letter
6. Letter to his daughter

## Related

- [Home](https://lostark.wiki/)
- [Achievements](https://lostark.wiki/database/achievements)