What is considered 1st class government mail

In the United States, the United States Postal Service (USPS) uses a classification system to determine the speed and level of service for mail delivery. Here's what's considered "First-Class Mail":

First-Class Mail is a type of mail that is considered the most important and time-sensitive. It includes:

  1. Letters: Envelopes containing written correspondence, such as bills, invoices, and personal letters.
  2. Postcards: Single-piece mailings with a message on one side and an address on the other.
  3. Flat Mail: Large envelopes (up to 13 inches long, 12 inches wide, and 0.5 inches thick) containing documents, such as bills, statements, and catalogs.

To qualify as First-Class Mail, the mailpiece must meet the following criteria:

  1. Weight: The mailpiece must weigh 13 ounces or less.
  2. Size: The mailpiece must be rectangular in shape and meet the following dimensions: up to 11.5 inches long, 6.125 inches wide, and 0.25 inches thick.
  3. Content: The mailpiece must contain only written or printed matter, such as letters, postcards, or flat mail.
  4. Addressing: The mailpiece must have a valid address and postage.

First-Class Mail is typically delivered within 1-3 business days, depending on the distance and the level of service chosen. There are two types of First-Class Mail:

  1. First-Class Mail Service: This is the standard First-Class Mail service, which is typically delivered within 1-3 business days.
  2. First-Class Mail Priority: This is a faster service, which is typically delivered within 1-2 business days.

Keep in mind that First-Class Mail is not the same as Priority Mail, which is a separate service offered by the USPS. Priority Mail is a faster and more expensive service that is typically used for packages and larger items.