Greek letter Ω showing as # in PDF

Hi,   We have HTML content that's cleaned using XSS Sanitize and subsequently printed in a document template (PDF). However, we noticed that the Ω sign (used in the HTML content for ‘Ohm’) is replaced by a #   Anyone have an idea how to keep this specific ohm-sign?  
1 answers

As Ronal Catersels mentioned, you should check your font.

Also in a document template whenever using a foreign character, meaning that the character is not available in the font you are using, it will not be properly shown.