Returning part of the commission or giving anything of value to the insured as an incentive to buy a policy is

Coercion involves the use of force, threats, or intimidation to compel someone to act in a certain way. It is characterized by the exertion of undue pressure or influence to manipulate another party's decisions, typically against their will. In the context of insurance, coercion would involve tactics that restrict the insured's freedom of choice rather than providing incentives.

Defamation refers to the act of damaging a person's reputation through false statements, which may be either spoken (slander) or written (libel). It involves spreading misleading or harmful information about an individual or entity that tarnishes their character or credibility. Offering incentives to buy insurance does not fall under the category of defamation.

Controlled business pertains to insurance transactions involving individuals or entities in which the insurance producer has a financial or familial interest. These transactions are subject to specific regulations to prevent conflicts of interest or potential abuses. However, returning part of the commission to the insured as an inducement is a separate practice unrelated to controlled business arrangements.