<<Disclaimer: Verify this information before applying it to your situation.>>

All reasons listed in the following post are reasonable, however, would any
hospital, nursing home, or school, argue with you if you stated you had
celiac disease? Any time I've visited the urgent care at my HMO, or an
emergency room and they've asked me if I had any allergies or pre-existing
conditions and I tell them celiac disease and wheat allergy and they've
never asked me for proof. If you enroll a child in school and tell the
school your child is allergic to peanuts or milk or bee stings, the school
doesn't require you to prove it, so why should it be any different for
celiac? I've found that people in general take me at my word and the
majority are interested and ask for more info, even health care providers.
Just my two cents worth.

Karen