I was contacted by an employer by phone. He said that he had found my CV online and liked it very much. He told about his idea ( a software program) and said that he is setting up a team, though there is no one there yet. He asked me to sign a Non Disclosure Agreement (NDA) because he has already told me about his idea and emailed the NDA to me.
I am unsure whether it is safe to sign NDA with someone I talked only on phone. So I would like to know is there any harm in signing NDA? And, will there be any consequences if I refuse to sign it ?
Thank you very much!