Related Clues:

• Perforation site
• Mailing need
• Prefix for graphic
• If it's canceled, it's accepted
• Forever ___
• An e-mail doesn't need one
• What you might take on a trip
• Corner piece?
• ID card feature
• Notary public's device
• Something taken on Santa's knee
• "Forever" post office product
• Impress with a mark
• Evidence of payment of postage duty
• In brief, a snapshot