Is certified mail capitalized

In general, "Certified Mail" is not capitalized as a title or heading, as it is a common noun phrase. However, if you're referring to a specific type of mail service offered by the United States Postal Service (USPS), you may see it capitalized as "Certified Mail" or "Certified Mail Service".

Here are some examples:

So, while "certified mail" is not typically capitalized as a standalone phrase, you may see it capitalized in specific contexts, such as when referring to a specific service or product offered by the USPS.