We had a big discussion once on Kingsnake about that subject.

It was interesting, however not nearly as effective as keeping them secure in the first place.

See if a cute little doggy runs away, there is almost always someone who will pick it up and take it home..

However if a snake should escape your home, it will most likely never be seen again, Not even by another human.

Unless of course it is something large and aberrant, then it can be worse yet (Like the story Shannon shared about the big albino that was decapitated.)

So in a nutshell, micro-chipping a snake is not likely going to be very effective.