The month of May marks the annual 'window period' for employees to obtain a reduction in mandatory dues payments from the Communication Workers of America (CWA) union.
The Foundation has had success challenging these window period schemes designed to trap workers into the union's forced dues-paying ranks, but if you're a CWA-covered employee in a non-Right to Work state who wants to opt-out of dues spent on activities unrelated to collective bargaining it is still recommended that you file your objection this month. (If you are under a Right to Work law you cannot be compelled to pay any dues whatsoever.)
For information on the forced-dues objection process, read this letter by Foundation Legal Director Ray LaJeunesse (pdf). The document includes a sample objection letter for CWA employees to send in to the agency fee administrator.