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Additional Information
   
 

The content of your mailpiece affects your range of mailing service options.

MAILPIECE CONTENT

Sometimes what you mail may restrict your available mailing services. For example, while any mailable matter (except certain hazardous materials) can be mailed as First-Class Mail, bills, statements of account, and personal correspondence must be mailed as First-Class Mail, Priority Mail, or Express Mail.

Sometimes what you mail may expand your available mailing services. For example, a small catalog or certain printed matter including printed letters can be mailed as either First-Class Mail or Standard Mail.

Express Mail
Mailable matter up to 70 pounds can be sent as Express Mail.

Priority Mail
Mailable matter up to 70 pounds can be sent as Priority Mail.

First-Class Mail
Mailable matter up to 13 ounces can be sent as First-Class Mail. Matter completely or partially handwritten or typed, personal correspondence, bills, and statements of account must be mailed as First-Class Mail, Priority Mail, or Express Mail.

Standard Mail
Mailable matter less than 16 ounces that is not required to be sent as First-Class Mail or as Periodicals can be sent as Standard Mail.

Periodicals
Publications (e.g., magazines, newspapers, and newsletters) that are published at a regular frequency of at least four times a year and that meet other eligibility standards can be sent as Periodicals. Periodicals have historically been considered a primary means of communicating news and information to the general public.

To mail at Periodicals prices, a publication must first be authorized by the Postal Service. There is a one-time application fee. While the prices for Periodicals are often less than Standard Mail prices, Periodicals receive a higher level of service. In addition, further discounts (e.g., nonprofit and classroom) are available for authorized publications of certain qualified organizations.

Periodicals service is available worldwide. A copy of the application and instructions on how to complete the form can be found in Handbook DM-204, Applying for Periodicals Mailing Privileges. A copy of the application and instructions on how to complete the form can be found in
- Handbook DM-204, Applying for Periodicals Mailing Privileges (HTML)
- Handbook DM-204, Applying for Periodicals Mailing Privileges (PDF)

Parcel Select
Matter not mailed as Package Services (Parcel Post, Bound Printed Matter, Media or Library Mail). Generally used for shipping merchandise.

Bound Printed Matter
Material that consists of advertising, promotional, directory, or editorial material that is securely and permanently bound (not loose-leaf in binders), consists of sheets of which at least 90 percent are imprinted by a process other than handwriting or typewriting, contains no personal correspondence, and is not stationery (such as pads of blank printed forms) up to 15 pounds can be sent as Bound Printed Matter. (Not available at retail outlets.)

Media Mail
Books of eight or more printed pages with only incidental blank spaces and no advertising except for incidental announcements of books, 16-millimeter or narrower width films in positive print for viewing (excluding films sent to or from commercial theaters), catalogs of such film of 24 pages or more, printed music (bound or in sheet form), printed objective test materials and accessories, sound recordings, video recordings, play scripts and manuscripts, printed educational reference charts, loose-leaf pages and their binders consisting of medical information, and computer-readable media containing prerecorded information up to 70 pounds can be sent as Media Mail.

Hazardous, Restricted, and Perishable Mail
For safety reasons, most hazardous materials are nonmailable. Restricted and perishable items are either nonmailable or mailable only under specific conditions. It is the responsibility of the mailer to fully meet all requirements prior to mailing. For more information, contact your manager of Business Mail Entry or see:
- Domestic Mail Munual 601.10 and
- Publication 52, Hazardous, Restricted, and Perishable Mail (HTML)
- Publication 52, Hazardous, Restricted, and Perishable Mail (PDF)

The following are examples of hazardous, restricted, and perishable items. These are not complete lists, but they provide an idea of the types of articles included in each category.

Hazardous materials include:

  • Corrosives
  • Explosives
  • Flammable liquids and solids, combustible liquids
  • Gases (under pressure)
  • Infectious substances, etiologic agents, clinical specimens, biological products, sharps, other used medical devices
  • Miscellaneous hazardous materials (i.e., dry ice, magnetized materials)
  • Other regulated materials–domestic (ORM-D)
  • Oxidizers, organic peroxides
  • Radioactive materials
  • Toxic substances (poisons)

Restricted matter includes:

  • Alcoholic beverages
  • Batteries
  • Controlled substances and drug paraphernalia
  • Firearms
  • Liquids and powders
  • Matter emitting obnoxious odors
  • Motor vehicle master keys
  • Sharp objects (knives, switchblades, stilettos)

Perishable matter includes:

  • Dead animals or parts of animals
  • Live animals
  • Eggs
  • Meat and meat products
  • Plants and plant products
 
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