A persuasive message for a claim or adjustment should appeal to the reader's sense of fair play,goodwill or moral responsibility.

Moral Responsibility

The obligation to act correctly and make decisions based on ethical principles, often considered in the context of social and personal conduct.

Fair Play

The adherence to equitable and impartial standards of conduct or rules in games, sports, or other competitions.

Goodwill

An intangible asset representing the value of a business's reputation, brand, and customer relationships.