Unfortunately, there can be numerous reasons for renegade missing fonts in files. If you can't find the culprit in your native file, check all the supporting files for missing fonts. Oftentimes a linked .EPS file will include fonts that don't convert properly, which can cause programs like InDesign to raise a red flag indicating a missing font. If you have an .EPS file that includes text, you can quickly convert the text to outlines by creating a new Transparency Flattener Preset and applying it to your .EPS files. Go to Edit > Transparency Flattener Presets in Adobe Illustrator and create a new preset. Check the "Convert All Text to Outlines" option, ensure your raster/vector balance is set to 100% for optimal quality and your resolutions for line art and gradients are set to 1200ppi and 300ppi respectively, and save this as a new preset.
Now, when you resave your .EPS files ensure you apply your new preset and all the text in the .EPS will be converted to outlines. This will fix any renegade missing font issues when you package your file for print production. This will also work in InDesign if you're saving to .EPS format.