Marquez v. Screen Actors Guild Inc., 525 U.S. 33 (1998), was a United States Supreme Court decision involving the validity of a union shop contract.

[1] The petitioner Naomi Marquez is a part-time actress who successfully auditioned for a one-line role in Medicine Ball, a television series produced by Lakeside Productions.

At some point afterwards, the SAG faxed a letter to Lakeside that it had no objections to the petitioner working in the production, but it was too late for filming had already started on schedule with the replacement actress.

NLRB v. General Motors Corp.: An employee can satisfy NLRA § 8(a)(3) "membership" condition merely by paying to the union an amount equal to its initiation fees and dues.

Communications Workers of America v. Beck: NLRA § 8(a)(3) does not permit unions to exact fees or dues over the objection of nonmembers for activities that are not germane to collective bargaining, grievance adjustment, or contract administration.