After reading your question, you work in a big company and the labor contract was signed by another company. You can think that this other company is a subsidiary of a big company; In addition, social security is also paid by another company, and it is recorded in the computer of the social security center. Actually, don't think about it. It's nothing.

1. The new company will not go to the Social Security Bureau to find out which company a new employee originally belongs to. Unless the new employee has a big problem and can't find anyone, it is possible for the new company to inquire about the employee's original work unit.

In your mind, the company you signed with is a subsidiary of a big company, and you did work in a big company. If someone asks about this, answer it like this, so that people in the new company will have such an impression (I think it is a subsidiary of a big company, otherwise how could I sign a contract with you and pay social security? )。

You have worked in a big company, so you must know someone. In case you can't pass the customs, you can ask a big company to open a certificate to prove that you really work in this big company. Signing a contract with another company is not your problem, but the arrangement of a big company.

In addition, after you leave your former company, the staff of the former company will go to the Social Security Bureau for resignation and go to the provident fund management center for transfer (actually, stop paying). After you arrive at the new company, the new company will continue to pay social security and provident fund for you, and will not ask the employees which unit they originally belonged to. Don't worry.

Supplementary answer:

The provident fund account can't be wrong.

In the same province and city, an employee's provident fund account (including social security account) is unchanged, just like a person's ID card, so no matter which unit you transfer to in the same province and city, this account belongs to you, and no one can change or use it at will.

If the new company wants to see your resignation certificate (actually "resignation"): 1, you can say that Company B is a subsidiary of Company A; 2, there is really no way, you said you lost it, you can't find it, just for a while (don't pretend, it's meaningless).

After the new unit hires you, it will continue to pay you social security and provident fund. When you go through the payment formalities, just enter your ID card and your payment account will appear, no problem.