Related Clues:

• Letters on a party invitation
• Say if you'll be there
• Let us know, in an invite
• Decision-prompting request
• Answer, of a sort
• Tell if you'll be there
• Reply to an invite
• Party invitation request
• Wedding invitation letters
• Invitation initialism
• 'No alcohol provided'
• Certain answer
• Please reply
• Reply, please, in short
• Brief request to acknowledge invitation