Social security appeal dismissed; employer not a party despite employment contract validity.

The Supreme Court dismissed the cassation appeal filed by the pension authority against a lower court ruling that declared the applicant subject to social security. The applicant, a pregnant woman, had a fixed-term contract with an employer who was unaware of her pregnancy, leading to a dispute over the validity of the employment relationship. The court held that the employer was not a 'interested party' under the Civil Procedure Code because the contested contract was valid and the applicant's rights were directly affected, making the employer's participation unnecessary.