USPS 421 WINDOW CLERK STUDY GUIDE
2026 POSTAL REGULATIONS AND
CUSTOMER SUPPORT QUESTIONS AND
ANSWERS
◉ Items sent within the US APO, FPO, UN, and its territories and
possessions.
Answer: Domestic mail
◉ sets forth the policies, regulations and procedures governing
domestic mail
Answer: DMM- Domestic Mail Manual
◉ sets forth policies, regulations, and procedures governing
international mail
Answer: IMM- International Mail Manual
◉ contains policies and procedures for administrative ad support
functions within the postal service
Answer: ASM-Administrative and Support Manual
,◉ all manuals are found on line via?
Answer: Policy Net
◉ Guarantees overnight or next day delivery $100 insurance and
free tracking
Answer: Express Mail
◉ Premier Shipping service of the USPS
Answer: Express Mail
◉ Fast and affordable max 70lbs $50 insurance another premier
shipping service of the USPS 2-3 DAYS delivery
Answer: Priority Mail
◉ Bulk mail usually handled at distribution centers
Answer: Parcel Select
◉ Merchant pays postal fee returning merchandise bulk parcel
return product
Answer: Parcel Return Services
◉ First class mail, periodicals, standard mail, package services
, Answer: Mailing services
◉ proof of mailing uses PS Form 3800
Answer: Certified Mail
◉ Provides up to $5000 in coverage extra service requires PS Form
3813 or 3813-p
Answer: Insured Mail
◉ Provides date and time of delivery, free when you purchase
Priority mail now called USPS Tracking
Answer: Delivery Confirmation
◉ POM
Answer: Postal Operations Manual
◉ Official Source for updates and updated bi-weekly
Answer: Postal bulletin
◉ Does this package contain anything liquid, fragile, potentially
hazardous' such as/like perfume or lithium batteries?
Answer: 6 Part of HAZMAT question
2026 POSTAL REGULATIONS AND
CUSTOMER SUPPORT QUESTIONS AND
ANSWERS
◉ Items sent within the US APO, FPO, UN, and its territories and
possessions.
Answer: Domestic mail
◉ sets forth the policies, regulations and procedures governing
domestic mail
Answer: DMM- Domestic Mail Manual
◉ sets forth policies, regulations, and procedures governing
international mail
Answer: IMM- International Mail Manual
◉ contains policies and procedures for administrative ad support
functions within the postal service
Answer: ASM-Administrative and Support Manual
,◉ all manuals are found on line via?
Answer: Policy Net
◉ Guarantees overnight or next day delivery $100 insurance and
free tracking
Answer: Express Mail
◉ Premier Shipping service of the USPS
Answer: Express Mail
◉ Fast and affordable max 70lbs $50 insurance another premier
shipping service of the USPS 2-3 DAYS delivery
Answer: Priority Mail
◉ Bulk mail usually handled at distribution centers
Answer: Parcel Select
◉ Merchant pays postal fee returning merchandise bulk parcel
return product
Answer: Parcel Return Services
◉ First class mail, periodicals, standard mail, package services
, Answer: Mailing services
◉ proof of mailing uses PS Form 3800
Answer: Certified Mail
◉ Provides up to $5000 in coverage extra service requires PS Form
3813 or 3813-p
Answer: Insured Mail
◉ Provides date and time of delivery, free when you purchase
Priority mail now called USPS Tracking
Answer: Delivery Confirmation
◉ POM
Answer: Postal Operations Manual
◉ Official Source for updates and updated bi-weekly
Answer: Postal bulletin
◉ Does this package contain anything liquid, fragile, potentially
hazardous' such as/like perfume or lithium batteries?
Answer: 6 Part of HAZMAT question
