Mortified is licensed under the SIL Open Font License. This means that it can be used for most commercial uses; however, there are restrictions on redistributing the font and use of the font name.
Acceptable uses include: using the font to generate documents, and using the font to add lettering to t-shirt, logos, business cards, postcards, videos and websites.
More information about the SIL Open Font License (OFL) is available at
https://scripts.sil.org/OFL.