SUBREDDIT: r/personalfinance
TITLE: Question : Credit card open under my name (I never knew it exsisted... it has a $0 balance, $1,000 limit - USA)
POST: So I just happened to be checking a few things today and noticed that there is a Capital One card open under my name, that I wasn't aware of.
$0 Balance (thankfully) & a  $1,000 Limit.  

Note, I DO have an active Capital One card that I DID sign up for. 
I use it all the time, & pay it off diligently. 

But this other one is a totally different card with a different max, last 4 digits are different, etc. 

I never got a physical card for this mysterious account the mail, never get notices/updates via snail mail or any emails reguarding this card... you get the idea.  

Since I never signed up for this thing,  I want to address it ASAP before someone out there possibly screws me over. 

So question is... when I call up Capital One to dispute this, is my credit score going to take a hit if I ask them to close out an account that I never opened/used?
TL;DR: 
Mysterious Credit Card Account is showing on my Credit Report. Zero balance, but I never opened this. If I call to close this thing out, will my credit score be negatively affected?