Help plz in using fonts

I get many free fonts in various sites. But I don’t know if they are free to use in commercial purposes.
May I use any of them in the items to upload to Graphicriver ?
Is it mandatory the commercial licence of font in case of an item to be approved in Graphicrive ?
May it be a reason for an item to be hard rejected ?
Do the reviewers check font licences by the links we provide ?
Help me plz with suggestions.
Thanks in advance.

Well, you need to read the license to know if they allow commercial use of their fonts. If you could share the license here, I would be glad to have a look at it for you.

Thanks,
Is it mandatory the commercial licence of font in case of an item to be approved in Graphicrive ?
May it be a reason for an item to be hard rejected ?
Do the reviewers check font licences by the links we provide ?

Quite not sure, maybe it depends on the reviewer.

Probably not. A soft-rejection would be enough.

You have to have the proper license for everything you use in your item. But if a reviewer spotted something not right about copyrights and licenses, he would probably soft reject your item.