I had a strange experience while trying to check my mother into the hospital last week for some semi-emergency care. She is fine now and back at home. However, when we were checking her in, the clerk handed us a health care proxy form and told us we should "consider filling it out." I told her we already had a health care proxy for my mom and didn't need a new one. She seemed a bit put off by this, but eventually let it go. Is there some reason why we should have signed a new proxy? Some law, perhaps?