USPS 421 POSTAL WINDOW EXAM TEST PAPER
2026 COMPLETE QUESTIONS AND
SOLUTIONS 100% CORRECT
◉ Online International Services. Answer: Can order supplies, print
labels, complete PS6182 - Commercial Invoice, tracking, etc.
◉ PS6182. Answer: Commercial Invoice - Required for certain
commodities and destinations.
◉ Item 107PGG3. Answer: Global Express Guaranteed sticker
◉ Item 11FGG1. Answer: Global Express Guaranteed Air Waybill
◉ Commercial Base Pricing. Answer: Commercial Base Pricing is a
discounted rate offered to USPS customers who buy and print
shipping labels with an online postage service provider such as
Stamps.com. Commercial Base Pricing is always cheaper than the
retail rates given at the Post Office. Commercial Base Pricing is
available for the following USPS mail classes: First Class Package
Service, Priority Mail, Priority Mail Express, First Class Package
International Service, Priority Mail International, Priority Mail
Express International and Global Express Guaranteed.
,◉ Refunds. Answer: Request within 30 days, must have original
label and/or online record/receipt. Must fill out PS3533 -
Application for Refund of Fees
◉ PS3533. Answer: Application for Refund of Fees
◉ Priority Mail Extra Services. Answer: Extra services for this class
of mail include: Certificate of Mailing, Certified, COD, Tracking,
Insured, Registered, Restriced Delivery, Return Receipt, Return
Receipt for Merchandise, Signature Confirmation and Special
Handling. This class of mail usually comes with up to $50 of
insurance.
◉ Confirmation Services. Answer: Includes USPS Tracking (Label
400) and Signature Confirmation (PS153)
◉ Label 400. Answer: USPS Tracking
◉ USPS Tracking. Answer: Can be used with FC, PM, Package
Services and Parcel Select (Label 400)
◉ Signature Confirmation. Answer: Not available to APO/FPO or US
territories or possessions. (PS153)
,◉ PS3877. Answer: Firm Mailing Book for Accountable Mail - May be
used when more than 3 piece of accountable mail are presented for
one transaction.
◉ Insured Mail. Answer: Insurance coverage up to $5,000 in
indemnity to protect against loss or damage. Shipping insurance
costs are based on the item's declared value. There are limitations
for insuring some products and certain items. And some services,
such as Priority Mail Express® and Priority Mail® include insurance
in the price of service. Up to $500 at self-service kiosks. Use PS3813
- Domestic Insured Mail Receipt (Up to $500), or
PS3813-P - Domestic Insured Mail Receipt (Over $500) Online, Self-
Service Kiosks, Post Office
◉ PS3813. Answer: Domestic Insured Mail Receipt - Up to $500 - No
signature required
◉ PS3813-P. Answer: Domestic Insured Mail Receipt - Over $500 -
Signature Required
◉ PS1000. Answer: Domestic Claim or Registered Inquiry - Used to
file insurance claim.
◉ Insurance Claim Documentation. Answer: PS1000, original
mailing receipt, electronic receipt purchase, proof of value. Domestic
, claim MIGHT receive request to bring in item and packaging.
International claim WILL receive request to bring in item and
packaging.
◉ Certified Mail. Answer: PS3800 - Prove you sent it. See when it
was delivered or that a delivery attempt was made, and get
signature of person who accepts the package when combined with
Return Receipt (PS3811). May add Restricted Delivery (PS3806).
◉ PS3800. Answer: Certified Mail Receipt
◉ PS3811. Answer: Return Receipt
◉ Registered Mail. Answer: Found in DM-901. (Label 200) Most
secure way to send package. As part of the security conditions for
this mail class, must be sent with proof of mailing. Service can be
used with the following mail classes and services: First-Class Mail®,
Priority Mail®, COD, USPS Tracking (packages only), Restricted
Delivery, Return Receipt and Signature Confirmation™ (packages
only).
Please note that due to the tight security, it may take 10-14 days for
your shipment to arrive at its destination. Insurance up to $25,000.
Package is kept separately secured in facilities.
◉ Label 200. Answer: Registered Mail Barcode label
2026 COMPLETE QUESTIONS AND
SOLUTIONS 100% CORRECT
◉ Online International Services. Answer: Can order supplies, print
labels, complete PS6182 - Commercial Invoice, tracking, etc.
◉ PS6182. Answer: Commercial Invoice - Required for certain
commodities and destinations.
◉ Item 107PGG3. Answer: Global Express Guaranteed sticker
◉ Item 11FGG1. Answer: Global Express Guaranteed Air Waybill
◉ Commercial Base Pricing. Answer: Commercial Base Pricing is a
discounted rate offered to USPS customers who buy and print
shipping labels with an online postage service provider such as
Stamps.com. Commercial Base Pricing is always cheaper than the
retail rates given at the Post Office. Commercial Base Pricing is
available for the following USPS mail classes: First Class Package
Service, Priority Mail, Priority Mail Express, First Class Package
International Service, Priority Mail International, Priority Mail
Express International and Global Express Guaranteed.
,◉ Refunds. Answer: Request within 30 days, must have original
label and/or online record/receipt. Must fill out PS3533 -
Application for Refund of Fees
◉ PS3533. Answer: Application for Refund of Fees
◉ Priority Mail Extra Services. Answer: Extra services for this class
of mail include: Certificate of Mailing, Certified, COD, Tracking,
Insured, Registered, Restriced Delivery, Return Receipt, Return
Receipt for Merchandise, Signature Confirmation and Special
Handling. This class of mail usually comes with up to $50 of
insurance.
◉ Confirmation Services. Answer: Includes USPS Tracking (Label
400) and Signature Confirmation (PS153)
◉ Label 400. Answer: USPS Tracking
◉ USPS Tracking. Answer: Can be used with FC, PM, Package
Services and Parcel Select (Label 400)
◉ Signature Confirmation. Answer: Not available to APO/FPO or US
territories or possessions. (PS153)
,◉ PS3877. Answer: Firm Mailing Book for Accountable Mail - May be
used when more than 3 piece of accountable mail are presented for
one transaction.
◉ Insured Mail. Answer: Insurance coverage up to $5,000 in
indemnity to protect against loss or damage. Shipping insurance
costs are based on the item's declared value. There are limitations
for insuring some products and certain items. And some services,
such as Priority Mail Express® and Priority Mail® include insurance
in the price of service. Up to $500 at self-service kiosks. Use PS3813
- Domestic Insured Mail Receipt (Up to $500), or
PS3813-P - Domestic Insured Mail Receipt (Over $500) Online, Self-
Service Kiosks, Post Office
◉ PS3813. Answer: Domestic Insured Mail Receipt - Up to $500 - No
signature required
◉ PS3813-P. Answer: Domestic Insured Mail Receipt - Over $500 -
Signature Required
◉ PS1000. Answer: Domestic Claim or Registered Inquiry - Used to
file insurance claim.
◉ Insurance Claim Documentation. Answer: PS1000, original
mailing receipt, electronic receipt purchase, proof of value. Domestic
, claim MIGHT receive request to bring in item and packaging.
International claim WILL receive request to bring in item and
packaging.
◉ Certified Mail. Answer: PS3800 - Prove you sent it. See when it
was delivered or that a delivery attempt was made, and get
signature of person who accepts the package when combined with
Return Receipt (PS3811). May add Restricted Delivery (PS3806).
◉ PS3800. Answer: Certified Mail Receipt
◉ PS3811. Answer: Return Receipt
◉ Registered Mail. Answer: Found in DM-901. (Label 200) Most
secure way to send package. As part of the security conditions for
this mail class, must be sent with proof of mailing. Service can be
used with the following mail classes and services: First-Class Mail®,
Priority Mail®, COD, USPS Tracking (packages only), Restricted
Delivery, Return Receipt and Signature Confirmation™ (packages
only).
Please note that due to the tight security, it may take 10-14 days for
your shipment to arrive at its destination. Insurance up to $25,000.
Package is kept separately secured in facilities.
◉ Label 200. Answer: Registered Mail Barcode label
