You can mail or email a copy of the birth certificate for child dependents and copy of marriage certificate to add spouse along with a letter stating who you would like to add. The letter must include the member’s full name, ID# or last four of the Social Security Number. Email: Herrera@seiu25.org or Gonzalez@seiu25.org Mailing Address: SEIU Local 1 & Participating Employers Health Trust Attn: Member Services 111 E. Wacker Drive, 17th Floor Chicago, IL 60601