A Checklist explaining the steps that counsel should take when serving case-initiating papers on the New York Secretary of State (SOS) as the agent of a business entity in a case pending in New York State Supreme Court. This Checklist identifies the entities on whose behalf the SOS accepts service and explains the papers that must be delivered to the SOS, how to deliver them, when delivery must be followed up with a mailing, how to draft and file the proof of service, and how to calculate the defendant's response time.