I sell guns and try to be very safety conscious. EVERY gun that I hand to a customer is cleared. I usually hand over handguns with the slide locked back. If I show a gun to someone, put it back in the display case, show a second gun, and then go back to showing the first gun-it gets cleared again.
That's just good safety and etiquette, and you work with "an unknown quantity".
And I as a the receiver will always clear the gun myself, because I don't trust you.
My prefered method is the pinky test at a sand barrel.
Oh, OP - does he have a sand barrel for use as a clearing station? If not, when's his birthday?