That is a misstatement of high order.

NACHI members are not "required" to post a NACHI logo on their website or materials.

The NACHI COE states that it is the duty of each member to help promote the organization. To that end, a condition of membership in the organization is for any member that has a web site, brochure, or other marketing literature to include NACHI and/or "The National Association of Certified Home Inspectors" (in word, link, and/or text). Should another home inspection association be listed or referred to, it shall be positioned and sized in a manner equal to, or less prominent than that of NACHI. Should any member be found in violation of this rule, membership revocation can occur at any time, and without notice or recourse.