Civil surgeon's office is doing this wrong - NOTHING is sent to Department of State for stamping - they need to complete whatever form - vaccines?, sing, stamp that, put it in an envelope, seal it, and give it to the applicant. Applicant includes this when going to the interview (or mailing it in with their I-485). To be on the safe side, I'd even ask to see the form before it's put in the envelope and get a copy for myself, but that's just me.