The common law concept that requires an employee to render loyal and faithful service to the employer is : Duty of loyalty
Common law, also known as case law, is the law that come from different judicial decisions that happen in courts and other types of similar tribunals .This means that common or case law is what arises from court rulings or precedents.
The duty of loyalty means an employee is obligated to render “loyal and faithful” service to the employer, to act with “good faith,” and not to compete with but rather to advance the employer's interests.
Hence, the common law concept that requires an employee to render loyal and faithful service to the employer is duty of loyalty.
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