Words to Describe undeliverable

Things undeliverable often describes ("undeliverable ________")

• surveys
• magazine
• mail
• parcels
• addresses
• letters
• secret
• correspondence
• copies
• requests
• promises
• orders
• product
• position
• packages
• messages
• names
• questionnaires
• pieces
• articles
• perils
• address
• email
• message
• packets
• matter
• items
• goods
• promise