1. First class mail sealed or unsealed typed or handwritten materials including letters,
post cards and business reply mail. weighing 13 ounces or less
2. priority mail first class mail weighing more than 13 ounces. good way to get mail
delivered sooner.
3. standard mail mail that includes advertising promotional, directory or editorial
material or any combination of such material. mail in this class cannot
weight more than 15 pounds.
4. insured mail mail that has insurance coverage against loss or damage
5. registered mail mail of all classes protected by registering and requesting evidence of
it's delivery( receiver has to sign for it)
6. certified mail first class mail that also gives the added protection of insurance,
tracking and return receipt
7. packing slip a list of items in a package
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