On any Declared Suppressive Person an additional condition for return to status (Steps A to E of HCO Pol Ltr 1 March 1965) is Step B(l) which is the requirement that the SP pay off all debts owed to Scientology organizations.
Any Potential Trouble Source owing money to any Scientology organization is handled the same as any other Scientologist. Failure to discharge a financial obligation becomes a civil Ethics matter after normal, within-org avenues of collection have been exhausted.
Any PTS who fails to either handle or disconnect from the SP who is making him or her a PTS is, by failing to do so, guilty of a Suppressive Act.
Civil Court action against SPs to effect collection of monies owed may be resorted to, as they are Fair Game.