"Nope. Their iMessages stay blue on their phone, but they never say 'Delivered' on your end."
Pro tip.
Did you know? When you block a contact on iPhone, they don’t know they’re blocked —calls go straight to voicemail, texts disappear into a black hole (no "delivered" notification), and iMessages stay blue but never arrive. blocked contacts iphone
"To see your 'Wall of Peace' go to Settings > Phone > Blocked Contacts." blocked contacts iphone