Limitations of this study include the use of inexpensive (and therefore, not the most accurate) DFT functionals, modeling a limited set of substrates (especially in the third part of the work), inexhaustive sampling of the configuration space in transition state modeling, and, most importantly, the absence of experimental verification of the key conclusions. However, we believe that given the current state of the knowledge on Mn-porphyrincatalyzed fluorination, our paper will contribute to the progress in understanding such reactions by identifying promising directions of further research.