Despite its absence from many dictionaries, mis-see or missee is not unknown. OED 1 gives its first citation as 1591, and you may find it recurring across the centuries in Google Books right down to the present. (But you would do well to look for it in its inflected forms missees, missaw, misseen since most instances of missee represent missy as a name or title—the spelling usually indicates that a pidgin-English speaker is being quoted.)
It is by no means a common word, and most of the uses found in Google Books are drawn from literary criticism; but if you use it, in writing or in speech, I don't think you will be misunderstood.
Here are some contemporary uses in entirely colloquial contexts:
Maybe you missaw it as Spikes? (from a Pokémon forum)
Unless I mis-saw, didn't Christine's fondant start from shop-bought marshmallows? (from a forum on UK TV shows)
Out on the highway pickin' up clues / So much is mis-seen, so much to lose (from a John Fogerty song, “Premonition”)
I only got to examine them peeking in from the side, rather than actually handling them, so I may well have been mis-seeing what I thought I was seeing. :) from a sewing forum)