noun
pressure-sealed postcard; crimped postcard
A postcard whose edges are sealed by pressure, often used for confidential mail such as bills or personal information.
公共料金の請求書は圧着はがきで届くことが多い。
Utility bills often arrive as pressure-sealed postcards.
圧着はがきを開くときは、ミシン目に沿って丁寧に切り取ってください。
When opening a pressure-sealed postcard, please carefully tear along the perforation.
Compound of 圧着 (あっちゃく, 'pressure bonding') and はがき ('postcard').