My husband (a teacher) and I both have them. We need current ones always on file for working with our church youth, for hosting our exchange students and for any volunteering that we can fit in with our children's school. You can write this cost off. Frankly, I'm surprised that none of my parents have ever requested a copy...that said, I do state in my introductory letter that we have one and for what reasons. For me, if I requested one and my potential provider balked at it, it would be a big red flag. Just my 2 cents.