CLU stands for Chartered Life Underwriter. This is a designation that can be earned by professionals in the insurance industry. The CLU requires a total of eight courses. The designation also requires the following taken from the website.

    “You must meet experience requirements and ethical standards. Three years of business experience immediately preceding the date of use of the designation are required. An undergraduate or graduate degree from an accredited educational institution qualifies as one year of business experience. When using formal education as qualifying experience, the remaining two years must immediately precede the date of the award.”
The CLU designation signals that the professional has sufficient experience and knowledge to deal with life insurance policies.

Information gathered from insuranceachievement.com.