Jermaine Jackson owes more than $30,000 in child support.

The late King of Pop's brother - who is uncle to the 'Thriller' hitmaker's three children, Prince, 16, Paris, 15, and 11-year-old Blanket - has allegedly refused to pay the money he owes to Alejandra Jackson to help her raise their two teenage sons, Jermajesty and Jaafar, after falling behind on his payments over the past year.

According to gossip website TMZ.com, Los Angeles' Child Support Services Department (CSSD) has filed legal documents asking a judge to hold Jermaine in contempt for failing to meet his child support obligation from April 2012 through April 2013.

Jermaine - who was ordered to pay $3,000 a month for the two children, totalling $36,000 per year - sporadically paid a total of $5,621 over the past 12 months but failed to make any monthly payment in full.

He allegedly still owes Alejandra $30,378.

The CSSD claims Jermaine is guilty of 12 counts of contempt - one for each month - and wants him to be sentenced to 60 days in jail if he doesn't make the full payment by August, when a hearing has been scheduled to address the issue.

Jermaine previously fell $90,000 behind in his child support payments in 2011 but he eventually settled that dispute with Alejandra and paid her $80,000 instead.