Is Chris- a short form of Christopher?
A gentleman named Christopher signed Chris- in the email he wrote to me. When I reply him, what should I address him? Is Chris- OK? What's the function of "-"? A sign of abbreviation? I haven't seen it in people's names before.
P.S. He is in a higher position, so I want to show my respect to him. I used to call him Dr. + his last name.
Thank you!

Question

Is Chris- a short form of Christopher?
A gentleman named Christopher signed Chris- in the email he wrote to me. When I reply him, what should I address him? Is Chris- OK? What's the function of "-"? A sign of abbreviation? I haven't seen it in people's names before. 
P.S. He is in a higher position, so I want to show my respect to him. I used to call him Dr. + his last name. 
Thank you!

Answer

Agree with Mudy

Answer

Yeah it's right that Chris is a short form of Christopher. 
But it's very polite to address a person by using his full name if he or she is on a higher position. For example if u have to address him, u should write Dr. Christopher.

Answer

Yes :D

Answer

Yes, Chris is a shortened form of Christopher

Answer

If he is a Dr. then it's fine to address him as a doctor. Yes, Chris is a shortened version of Christopher, I think he probably meant to sign it as

-Chris

Which you usually do at the end of a letter or message and basically just signifies the persons name from my understanding.

لا تفوّت فرصة تعلّم لغة جديدة وأنت مرتاح في منزلك. تصفّح مجموعتنا المختارة من مدرّسي اللغات ذوي الخبرة وسجّل في درسك الأول الآن!