Hi, I wanted to know if it is against etsy policy to mention another company in a listing, like one that could print a digital download ?
I think it's okay to suggest where a buyer can have something printed.
If in doubt, ask the company if it is OK to use their name.
If you are just sending custom their way, they may be more than happy about it. But they may have some specific way they want the name used, such as being sure to include a trademarked symbol etc.
Ok, Thank you