If I quit can my employer hold my final paycheck for 30 days?

Question Details:

I have an hourly wage and, if I make collections, I get commission.  My employer states they can hold the final paycheck for 30 days but in the training manual it states, "By signing signature page for this training the employee acknowledges and gives all rights and permission to withhold employee's final check for 30 days" But I never signed the form. It's not in my employee file. Also, I make an hourly and a commission can they even hold the hourly? Can they reduce the hours I have already worked to minimum wage?

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