Nick Cannon has allegedly refused to pay his crew members, working on his new movie, "She Ball". He was given a month to pay everybody or face the music.

Nick and his production company received the letter, obtained by TMZ, from a lawyer representing 8 crew members who allegedly worked on the film as drivers, grips and camera operators ... but never got paid.

According to the letter, the 8 workers were not given their legally required meals or rest breaks, weren't paid overtime, but most importantly never got a check at all.

The letter warns Cannon's got 33 days to clear the debt or further action will be taken.

TMZ