Ironically can't seem to find an answer to this question with a google search, I always get a bunch of answers to other things. 

Let me explain my question:  For example, lets say my google email login is "me@google.com" and my password is "login1". 

But since I have a yahoo email too, sometimes I accidentally go to yahoo.com and type in my google name and password.  Of course google says "invalid" and asks me to retype it, then I realize what I did and go to the correct site. 

But I just realized something...if any of them actually SAVED the information you typed in, everytime someone accidentally tries to login to the wrong site *which I bet happens all the time*, they would now have a copy of their information.  *yahoo now knows my google login/password because I accidentally used it on their site*

Anybody know if any of them save invalid login info?