If I send out a link, can people forward that link on to other people? Do I need to do anything special to make sure it works?
Any link can be forwarded… You can’t necessarily just prevent a person from forwarding an email message or a link.
What I do (and have seen other do this in survey invitations that I receive) is provide my audience with clear instructions. Maybe something like the following:
feel free to forward this link to your friends and family or,
the link provided is a unique link and should not be forwarded to anyone
Hope that helps!
You can also look at your data download and see the referring URL (Referrer). That can help determine whether the respondent came from your site or email, or from somewhere else.
I don’t see why not… Your default survey link could easily be forwarded. As long as it’s not a unique link you should be good.