The best real estate professionals never work alone. Teamwork is...the key to any successful business and that's why HAR's affiliate members offer a wide variety of services to help you with your E&O insurance needs. The following companies can provide you with Errors and Omissions insurance. You can sort these E&O insurance companies by name or favorite a particular firm you've enjoyed working with in the past. HAR is committed to making the connection between you and your E&O insurance company as easy as possible.