Letter from Vault-Tec (Fallout 3)

 can be found randomly in mailboxes of ruined houses across the Wasteland. There are two versions of. One is informing the recipients that "their application to get into a Vault was denied, however Vault-Tec will retain their deposits in case an opening appears." Other version is addressed to Mr. and Mrs. Gomez informing them that their application to get into the Vault was accepted. This is an example of dark humor that was always inseparable part of all Fallout series games.