Well, in the example I gave the caster is in a different form so the Genie (who lacks true seeing) has no idea what they really look like. Heck, just for kicks you could make yourself look like a demon.Second, how is the Genie going to get an image of the characters? They can't benefit from their own wishes, and wouldn't be able to accurately use a wish to acquire the image of one of the 'many' people they have given wishes to in the past as they would lack the characters name or even an accurate description. Provided the disguise was good, they'd (at best) have an engraving of some random shmuck.Lastly....any Genie who offers up to three wishes to someone where the Genie is NOT guaranteed a quick trip home (ala Planar Binding for example) is putting themselves at the utter mercy of whoever they enlist. There would be 'nothing' to prevent someone from permanently enslaving the Genie using any of the three wishes granted rather than helping them. (Classic Aladdin's Lamp stuff)