Which of the following is NOT one of the methods of formal recognition?

The method of formal recognition that is not included in the typical categories is the Medal of Valor. While it is indeed a significant form of recognition often awarded for acts of extraordinary heroism and bravery, it does not fall under the standard methods considered for formal recognition in many organizations.

The other options—Certificate of Commendation, Meritorious Mast, and Letter of Appreciation—are all established methods used within many institutions to acknowledge and formally recognize achievements, contributions, or acts of service by individuals. These methods are generally more routine and accessible for a variety of accomplishments, whereas a Medal of Valor is less common and typically reserved for specific acts of valor in the face of extreme danger or difficulty. This distinction clarifies why the Medal of Valor is the outlier in this group.