Question about job

My sister just started at Tropical Smoothie as her first job. She told me yesterday that the first week she was "training" (got 1 or 2 days of training), she did not get paid. She said that the manager told her employees don't get paid for training and she worked a full week off the clock. She also told me that tips are not given to employees. Is all of this true? Or is this illegal like I think it is? Please let me know because I don't think this is right