Adsense is a service by Google where you can earn money by advertising. It is very difficult to register, get approval, show ads. So you have registered, you get approval, does this end with this? No.
There are other approval steps for Adsense real people to advertise, to ensure that everyone is registered and properly advertised. This is called Adsense Pin. After your ads start showing, you are asked to enter your pin and you are given a few months for this. Here you need to pay attention to use the correct name and address. Even though everything is fine, your pin may not come. So how do you enter your pin?
Requesting a Pin from Adsense is once a month. If not, you can ask for it again. However, if it still does not come, when the process reaches a certain stage, you will verify manually if your pin did not come in 4 times or you want. But as I said, this is an active activity at the end of a certain period.
When it is active, you can scan and enter the ID or scan and send an invoice registered at the same address. Then you can manually enter the pin.