What you're describing sound a bit like laparoscopy scars (keyhole surgery). Whilst they certainly do a lot of tubal ligation by laparoscopy nowadays; they also do lots of other things so it's sadly impossible just to go on the scars...
If you can get hold of an abdominal X-ray (hell, why not?
) you may be able to see the clips.
We usually quote a success rate of above 99%; these things are not supposed to be reversible and people having them are told that effectively they are not (though in practice it may be possible). Incidentally, vasectomy is much more reliable (about 99.95%). Hysterectomy (yes, removal of the womb, usually ovaries and sometimes cervix at the same time) is pretty reliable though
