Witness Protection is a common Enchantment — Aura card from The List (PLST), collector number SNC-66. Current market price: $0.14, TCGplayer market prices via Scryfall.
Enchant creature Enchanted creature loses all abilities and is a green and white Citizen creature with base power and toughness 1/1 named Legitimate Businessperson. (It loses all other colors, card types, creature types, and names.)