Employer Identification Numbers (EIN) are used to identify a business through a nine-digit number. This number is necessary for a business to open a bank account, use accounting software, apply for business licenses, and file tax returns. In recent years it has become common for a bank, software provider, or government office to ask for a copy of the letter that the IRS sends to a business at the time of assigning the EIN. Having the EIN letter also helps an organization confirm the official name of the business per IRS records.
If a business has disposed of or lost its EIN confirmation letter then it can request an EIN verification letter through the IRS Business and Specialty Tax Line at 1-800-829-4933. The caller will have to verify his or her identity and answer security questions about the business to receive a new verification letter. The letter will either be mailed or faxed to the business.