How much would it cost if I transfer my fiance's Verizon account to my account? I have an extra line that I would like to set up with her phone. Her contract ends Sept 2015 so does that mean an early termination fee applies?
Assuming your fiance is keeping her own number there is no ETF as long as she's moving from Vzn-to-Vzn. You will need to complete an AOL (assignment of liability) to move the line from one acct to the other.
If she wants to take over the extra line (& phone number) on your account and give up her number that is a totally different answer.