Only medical and religious exemptions are acceptable. I would really appreciate the sample letters you use for entering school in Mass.I do not know if I'm going to run into a problem with the Catholic preschool. In either event, you can use this document as a general guide to help you think about and personalize your own request for a religious exemption. Religious exemptions to some or all vaccines may be allowable if parents complete the following form: Religious Exemption Form. I request a religious exemption based on my sincere religious beliefs. The religious exemption request should state in writing that a vaccine conflicts with the individual's sincerely held religious belief.