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Official websites use .gov
A .gov website belongs to an official government organization in the United States.

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Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

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Is there a total character limit or any characters that are not allowed in the document file names?

The file names have a character limit of 256 characters. Asterisks and backslashes are not allowed.