People owe me money, write a white note. Is it legally binding?

This IOU is legally binding only if I sign it. You can go to court to file a lawsuit, and ask the judge to mediate before the lawsuit. With this fact clear, the judge is very willing to mediate between the two parties. Invite both parties to appear in court together, make a record and take effect after signing. If you get a civil mediation document, you can apply for execution if the other party has not paid it on the effective date of the legal agreement. If the other party is not very rogue, they will usually pay. If you really meet that kind of person, you can ask the enforcement judge to seal up the other person's personal savings account and salary account. If the amount is large, you can also seal up the movable property, real estate and the like of the other party. Good luck!