Related Clues:

• Stationer's piece: abbr.
• SASE pt.
• Bill holder: Abbr.
• SASE, e.g
• It needs to be addressed: Abbr
• Ltr. encloser
• P.O. purchase
• Item in a P.O. box
• Stationery item: Abbr
• Letter holder: Abbr
• Card holder: Abbr
• It's stamped at the P.O
• Letter carrier: Abbr
• Greeting-card holder: Abbr
• Letter holder (Abbr.)