I have resigned for two months, and I have been given the certificate of resignation, but what should I do if the company continues to pay me? Should I return it?

This is the negligence of personnel or financial management in your last company. If you don't need the money, you can notify the personnel department first and return it to the company. If you don't think it's your fault, it's up to you to teach the company a personnel and financial mistake, but it seems that the company hasn't found it yet, and it depends on your final decision. It happened to my former friends, too, and it stopped automatically after five months. The company probably found it, but it probably realized that it was its own fault and didn't look for him, but after looking for him, he might not return it because it was unclear. So it's up to you.