Digital Certificate on a drawing

Good afternoon,

Willing to use Draftsight but we need to be able to include a Digital Certificate signature when saving a drawing. It's something that can be done in draftsight? 

I'm capable of doing it in Autocad but haven't been able to find it in Draftsight and haven't seen it in any discussion or help.

Any Idea?

Thanks in advance!!!

Best Regards,

Aleix