I lost or misplaced my EIN number, where can I get a copy? If you lost your EIN documents, you can visit the IRS website where you can get a copy of your EIN number. https://www.irs.gov/businesses/small-businesses-self-employed/lost-or-misplaced-your-ein Related articles Where can I find my legal business name? How do I update the EIN on my account? What business documents do I need to open an account? What is an EIN? Why does Novo ask for application documents that others do not?