Rubber-Stamped Message on Confidential Letters
Puzzle 12 of Preparing for Guests Easy Pack
Question is: Rubber-Stamped Message on Confidential Letters
and the answer is: TOPSECRET
Word Meaning:
TOP SECRET — (military, government) Information classified at one of the highest levels of sensitivity by a government, based on an assessment that it would cause exceptionally grave damage to national security if disclosed.
Definitions from Wiktionary.