I've had the very rare missing piece before, but have never received a piece that (according to the parts list) isn't even in the set! Bag 2 in the new Space Shuttle
Missing Lego Pieces Tracking Sheet : r/lego
Buy and replace Lego® parts | Shop comparison
Replacement parts | Letbricks
How To Order Lego Replacement Parts for Missing Pieces (2019 Update) | Free lego, Lego, Cool lego
Bricks & Pieces - Customer Service - LEGO.com US
LEGO's Replacement Parts Site — Brickset Forum
missing lego pieces replacement
Missing pieces on every order officially guaranteed by LEGO : r/lego
Please tell me Lego sends out replacement parts quickly! Missing one peice and stalled on bag 6. : r/lego
LEGOS Figurines Missing Parts - Etsy
Can You Order Missing LEGO Pieces? If So, How? - VerbNow