Bar-goers' needs

• They're often flashed in front of bouncers
• Passports and driver's licenses, for short
• Checks at the door, say
• Passports, licenses, etc
• They're checked at check-ins
• They may be checked for checks
• They're checked at liquor stores
• Club requirements, maybe
• They may reveal your age: abbr

Wiktionary Word definitions in Wiktionary
n. (plural of id English)