I had to put nail polish on my front door key because I have 6 other keys that look alike...and I still can't manage to get the right one on the first try
I know you have lots of fingernail colors put a drop on your key and a drop on your door. easy fix. I know cause I am a dolt and everything must be easy for me
I'm a computer science major and I have more trouble with the USB. lol
It would of course depend on the doors. Are they dissimilar enough that the keys give any hints as to which door it may open? I suppose you would be right if none of the two doors had any locks. Kind of difficult, an exercise in futility even, if this were the case. Are they physical doors or something more elaborate than that? I find myself being quite unable to answer you with this lack of information :)
I was tired of mixing up keys so I had my house redone, there is only one key, I have made many copies. If you have trouble knowing which key goes to the door, put a drop of colored fingernail polish on the door and the key. no more mixups..