Many workplaces have instituted charitable giving campaigns. For the employee's convenience and ease of collection, some employers allow their employees to have the amount of their contribution deducted from their paycheck. However, any deductions made from your paycheck must be voluntary, and authorized by you in writing. Your employer is not legally allowed to make a deduction for charitable giving purposes that you did not authorize.
If a charitable contribution has been withheld without permission, you may first want to check to see with your company's HR department, to find out the company's basis for withholding a contribution. (You might have authorized a deduction without realizing it.) However, if you did not authorize the contribution, and the company refuses to refund the amount of the contribution, you may wish to consider filing a complaint with a federal or state administrative agency. However, given the amount and the potential political fallout from making a challenge of this nature, you may wish to work with your company to attempt to reform the process by which your employer solicits charitable contributions, so that all employees' contributions are truly voluntary.