My treehouse set mist a piece. First time to have a missing piece in a new set. luckily Lego support helped me out! Love their fast service. : r/lego
What to do if a LEGO Set is Missing Pieces? – Brick Bucks
VTG 1980s Lego Classic Town + Space Mini Figures Lot of 7 Damaged Missing Parts | eBay
Lego SPACE POLICE SPACE TRUCK GETAWAY (5972) Missing Parts | eBay
Get Your FREE LEGO Missing Parts, Broken Parts (Cantonese) - YouTube
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
LEGO Elves 41178 The Dragon Sanctuary - Incomplete, Missing Parts | eBay
Find That Missing Brick With This Lego Parts Database | WIRED