A promissory note claim is a suit to collect money a borrower promised in writing to repay. A guaranty claim is a suit against the person or company that promised to pay if the borrower didn't. Texas treats both as contract claims with firm limitations periods, and the documents usually decide the outcome.
We represent both sides. Many cases end in a payoff or workout before trial, and those that don't are often decided on summary judgment, because the note, proof of who owns it and evidence of the balance can establish the claim unless the defense raises a real fact dispute.