USPS 421 WINDOW CLERK EXAM SCRIPT
2026 MAIL ACCEPTANCE AND DELIVERY
SERVICES COMPLETE SOLUTION VIEW
◉ In order for a postcard to be mailed it must be:
Answer: rectangular
◉ The maximum size of a flat is 15" long and .75" thick. What is the
maximum height?
Answer: 12"
◉ Proper design and construction of a mail piece which conforms to
minimum and maximum mailing standards ensures
Answer: Mailability
◉ Correctly identifying non-machinable characteristics of First Class
Mail letters and applying correct pricing helps to protect
Answer: Revenue generation
◉ A letter that is square instead of rectangular is considered
Answer: Non-machinable
,◉ How are Non-machinable letters are processed:
Answer: Manually
◉ What document is used to show contents for international
mailings
Answer: Customs
◉ Which item is rectangular and cannot exceed 3/4" thick. 12"×15"?
Answer: Flat
◉ What must a flat be in addition to meeting rectangular and size
requirements?
Answer: Flexible
◉ Mail your of mail provides date certain delivery to about 180
countries
Answer: GXG
◉ What type of parcel must weigh at least 6 ounces, but not more
than 25 pounds?
Answer: Machinable
, ◉ What term is used to determine if an item can be admitted into
the mainstream
Answer: Mailability
◉ What type of mail includes insurance for document
reconstruction (up to $100)
Answer: PMEI
◉ What type of mail is send outside of the United States, is
territories and possessions
Answer: International
◉ What is the only mail service you can use when mailing cremated
remains via domestic mail
Answer: PME
◉ Can you mail strike anywhere matches internationally
Answer: No
◉ Can you mail honey bees via surface?
Answer: Yes
◉ Can you mail a knife
2026 MAIL ACCEPTANCE AND DELIVERY
SERVICES COMPLETE SOLUTION VIEW
◉ In order for a postcard to be mailed it must be:
Answer: rectangular
◉ The maximum size of a flat is 15" long and .75" thick. What is the
maximum height?
Answer: 12"
◉ Proper design and construction of a mail piece which conforms to
minimum and maximum mailing standards ensures
Answer: Mailability
◉ Correctly identifying non-machinable characteristics of First Class
Mail letters and applying correct pricing helps to protect
Answer: Revenue generation
◉ A letter that is square instead of rectangular is considered
Answer: Non-machinable
,◉ How are Non-machinable letters are processed:
Answer: Manually
◉ What document is used to show contents for international
mailings
Answer: Customs
◉ Which item is rectangular and cannot exceed 3/4" thick. 12"×15"?
Answer: Flat
◉ What must a flat be in addition to meeting rectangular and size
requirements?
Answer: Flexible
◉ Mail your of mail provides date certain delivery to about 180
countries
Answer: GXG
◉ What type of parcel must weigh at least 6 ounces, but not more
than 25 pounds?
Answer: Machinable
, ◉ What term is used to determine if an item can be admitted into
the mainstream
Answer: Mailability
◉ What type of mail includes insurance for document
reconstruction (up to $100)
Answer: PMEI
◉ What type of mail is send outside of the United States, is
territories and possessions
Answer: International
◉ What is the only mail service you can use when mailing cremated
remains via domestic mail
Answer: PME
◉ Can you mail strike anywhere matches internationally
Answer: No
◉ Can you mail honey bees via surface?
Answer: Yes
◉ Can you mail a knife
