Bristol Palin's ex Levi Johnston is told to hand over $62,000 in unpaid child support after bitter battle over cash for their son Tripp

Bristol Palin's ex-fiance has been ordered to pay $62,000 in unpaid child support after a lengthy battle over their son's upbringing.

Levi Johnston, to whom 25-year-old Palin was twice engaged, was told he faces the bill increasing with interest if he does not pay up.

Johnston, 26, who now has two younger children with his wife Sunny Oglesby, had been involved in years of acrimonious hearings over the custody and maintenance of seven-year-old Tripp.

In the latest ruling he was told to pay a total of $53,450.06 in back child support from Levi along with $8,456.15 in prejudgment interest for a grand total of $61,915 that will continue to grow with six per cent interest.

The father of Bristol Palin's (pictured) seven-year-old son Tripp has been told by a court in Alaska that he must pay back child support with interest 

Levi Johnston, 26, has been told to by a court in Alaska that he must pay Palin $61,915 in child support with the total growing by six per cent interest until he had paid back the interest

Palin and Johnston (pictured above in 2010 with a young Tripp) were previously engaged twice, but  permanently broke things off in the fall of 2010

Court documents seen by Daily Mail Online show Judge Eric B Smith made the ruling this week.

A custody settlement was previously made, following years of nasty courtroom disputes between the exes. The terms of the agreement were sealed by the court.

Johnston filed court documents in 2013 in an attempt to get 50/50 custody of Tripp, claiming it was in his son’s best interest to have his father around as much as his mother.

Palin had previously been granted full custody of Tripp by another judge.

At the time of Johnston’s filing, Palin’s lawyer claimed the custody demand was an attempt to reduce child support, adding that Johnston owed $66,000 at the time.

Johnston, however, said at the time that he was willing to pay any amount of child support.

But shortly after the custody papers were filed, Palin argued in court that Johnston wasn’t a suitable parent and demanded that the 50/50 custody plea be denied.

She mentioned that he was behind on his child support payments and hadn’t visited Tripp on a regular basis.

She added that Johnston spent recklessly on cars, hunting and fancy trips.

Last year, the dispute got so ugly that Johnston tried to have Palin found in contempt for allegedly traveling outside of Alaska without his permission.

Johnston, 26, who now has two younger children (pictured in purple and pink) with his wife Sunny Oglesby (left), had been involved in years of acrimonious hearings over the custody and maintenance of Tripp (center)

Johnston (pictured with his two younger children) married Oglesby in 2012, two years after he and Palin broke off their second engagement

Palin also has a daughter, named Sailor Grace, with 27-year-old ex Dakota Meyer, who earlier this month filed court documents to change Sailor Grace's last name from Palin to Palin Meyer

The exes have been arguing in court for more than a year, and a hearing was scheduled to take place last September.

But Palin and Johnston filed a joint motion to vacate the hearing and reached a settlement on custody and child support.

And on May 24, the judge presiding over the case awarded Palin with $61,915 in child support, which will continue to grow with interest until Johnston pays off the debt in full. 

Palin also has a daughter, named Sailor Grace, with 27-year-old ex Dakota Meyer. 

Earlier this month, Meyer headed back to court to demand that Sailor Grace, legally have her last name changed from Palin to Meyer.

The judge in the case has set a hearing for next month when he will decide whether or not to approve the name change

According to court records obtained exclusively by Daily Mail Online, Dakota filed a change of name petition in Alaska Court on May 5.

The records show that Bristol named their daughter Sailor Grace Palin on the birth certificate. Dakota is demanding that his newborn's name be legally changed to Sailor Grace Palin Meyer.  

The petition comes after months of nasty fighting between Dakota and Bristol as he demanded more time with his daughter and Bristol insisted Sailor couldn't be away for long periods of time because she was breast-feeding the baby.

Despite months of back and forth the two were finally able to reach an agreement on child support and custody.

Bristol Palin indicated that her and former fiance Dakota Meyer may have put their differences aside as proud co-parents of their four-month-old daughter Sailor Grace. 

Meyer's petition comes after months of nasty fighting between Dakota and Bristol as he demanded more time with his daughter

Despite months of back and forth over custody issues, Palin and Meyer have reached an agreement on child support and custody and decided to try co-parenting