Can only the amount of payment for goods and the signature of the boss be used as proof of arrears?
 It can be used as evidence, but it is not a direct debt voucher. According to the law, the legal representative or person in charge of the unit has the function of representing the external unit. If the legal representative or person in charge of the unit signs to confirm the amount of goods payment between both parties, the confirmation is legal and valid. As for the amount owed by the unit, the amount paid for goods should be deducted from the confirmation document. In addition, according to the provisions of the Civil Procedure Law, the parties have the burden of proof for their own claims. As creditors, if they can provide the documents of the total amount of payment for goods confirmed by the other party, and claim the corresponding arrears from the other party on this basis, they have fulfilled their burden of proof. As for the other party that the actual amount of debt is not correct, The other party should bear the burden of proof for the actual payment amount, and the other party should provide evidence to prove the actual payment amount. Article 64 of the Civil Procedure Law of the People's Republic of China stipulates that the parties have the responsibility to provide evidence for their claims. The people's court shall investigate and collect evidence that the parties and their agents ad litem cannot collect on their own due to objective reasons, or that the people's court deems necessary for the trial of the case. The people's court shall examine and verify evidence comprehensively and objectively in accordance with legal procedures. Article 65 The parties shall timely provide evidence for their claims. The people's court shall, according to the claims of the parties and the trial of the case, determine the evidence that the parties should provide and the time limit for it. If it is really difficult for the parties to provide evidence within the time limit, they may apply to the people's court for an extension of the time limit, and the people's court may appropriately extend the time limit according to the party's application. If the party concerned provides evidence within the time limit, the people's court shall order it to explain the reasons; If he refuses to explain the reasons or the reasons are untenable, the people's court may refuse to accept the evidence according to different circumstances, or accept the evidence but admonish or fine him. Is this easy to understand?