There are several insurances, saying that the company will sign the bill as soon as it pays. Is this ok?

No There are several kinds of insurance, but there is no real intention to buy insurance, just to get the commission from the company and hang up the bill, which is immoral and illegal. This kind of behavior is called hanging insurance policy or fake insurance policy. Hanging the insurance policy is a kind of fraud, involving false transactions, deceiving the insurance company and damaging the rights and interests of the real insurer.