Can I use non-standard fonts within an ordered service?

Yes, you can, but when ordering a services which involves non-standard/commercial fonts be sure to attach these fonts to the task (and commercial fonts purchased).

If the fonts won't be attached, then the time spent by the developer on searching/purchasing the font will be added to the task's invoice. Therefore, it is much better (and cheaper) to add such files to the task yourself.

Keep in mind that the font formats must be in one of the most common web formats — TTF/OTF or WOFF.