Flip or Flop stars Tarek El Moussa and Christina El Moussa have been slapped with a lawsuit by a North Carolina realtor who claims the couple had hired him and still owes him the money promised.

The estranged spouses are being sued by a realtor named Jonathan Schmier, who claims Tarek and Christina hired him to find houses for them to flip but then never paid him, Us Weekly reported.

According to documents obtained by the website, Schmier alleges that "Tarek and Christina El Moussa were... going to be filming the show Flip or Flop in North Carolina" and sought him out to "find homes for them in the major cities such as Raleigh, NC."

Schmier reportedly claims the HGTV reality stars made a deal to pay him $5,000 per home but never followed through on their agreement.

Schmier therefore alleges he is entitled to "back wages in the amount of $12,800," according to Us, as well as "commission in the amount of $25,000."

Christina and Tarek are also reportedly being accused of blocking Schmier's "e-mail address and Facebook pages and phone numbers in an attempt to avoid paying [him] what he is entitled to."

The house-flipping duo continue to work together to film Flip or Flop despite having separated in May 2016 and Tarek filing for divorce from Christina in January 2017.

"We are aware of the lawsuit filed in North Carolina but we don't comment on pending litigation," HGTV told Us in a statement.

An insider told the magazine, however, that Tarek and Christina "were never going to flip a house in this state," because "there's nothing here."

The estranged spouses -- who are parents to daughter Taylor, 6, and son Brayden, 20 months -- reportedly declined comment on the lawsuit.

Tarek and Christina publicly announced in December 2016 they had decided to split after seven years of marriage. Shortly afterwards, both individuals revealed they had been dating other people already.