answers.bungie.net (Destiny)

by Vortech , A Fourth Wheel, Wednesday, July 22, 2015, 22:52 (3511 days ago) @ Earendil

Q: If I delete a character, can I lose my Triumphs, or Emblem?

A: Yes. Triumphs are character based. If you delete a character that has completed a Triumph, or any percentage of a triumph, you will lose that progress.

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Q: I have found all Golden Chests on all planets, but my Triumph tally isn’t counting them

A: We advise finding all 20 chests on a single character. You have the ability to check your progress in game, under the director, by planet. Please note, deleting a character could result in a loss of progress.

https://www.bungie.net/en/Help/Article/13144