Stick to universally accessible fonts (Arial, Calibri, Times New Roman, Helvetica) when creating documents meant for external distribution.
When a PDF is created (by software like Adobe Acrobat, iText, or Ghostscript), it assigns local names to fonts. Common conventions: cidfont f1 normal fixed
If your document does not require specialized CJK characters, switch to standard Type 1 or TrueType fonts (e.g., Arial, Times New Roman, Calibri). Stick to universally accessible fonts (Arial, Calibri, Times
To help narrow down your specific issue, please let me know: Stick to universally accessible fonts (Arial
If you run a website or software system that generates PDFs and your users are complaining about this issue, the root cause lies in your PDF rendering engine (such as TCPDF, iText, wkhtmltopdf, or Dompdf).