What document must veterans submit when applying for plumbing examination credits?

Veterans must submit the DD-214 when applying for plumbing examination credits because this document is a crucial record that provides proof of military service. The DD-214, or Certificate of Release or Discharge from Active Duty, contains significant information such as the dates of service, type of discharge, and other pertinent details that validate a veteran's eligibility for specific benefits and credits related to licensure in plumbing.

This document is widely recognized by various licensing boards and organizations as the authoritative proof of military service. By using the DD-214, veterans can receive appropriate recognition of their training and skills gained during their time in service, which can be applicable to their plumbing qualifications. Submitting this specific form makes the process smoother and ensures compliance with established requirements for credit approval in professional examinations. The other options, while related to military service or identification, do not universally serve the same purpose as the DD-214 in this context.