First you copy or type the pay ID then after when you input the BTC unit or the USDT figure, you click next and it will ask you to type the last two digits of Binance ID and not pay ID so the recipient has to send the two IDs to the sender and make sure you should indicate Pay ID and Binance ID so it will not confused the other people. Both the Pay ID and Binance ID.
When you login to your Binance, and you want to send your IDs. Click click on your profile and on the left top , copy the ID and save it in a secure place. Then you go and click on PAY on that the same page then you will see another ID again which is different from the former one, copy it and save it as well. Then you have to send the two IDs to the sender (the one who wants to send you the coins),
And this for those who want to send Coins. The followings are the processes or the steps. When the receiver send you the IDs, copy the first one which is the Binance ID then click on your Binance profile, and click on PAY then click on SEND, and on the "Send to Binance User, click on Binance and continue and in the next page enter the amount either in BTC or USDT l, any one the receiver ask you to pay, and click continue. The next step is the main reason why this thread is created. When you click continue, it will ask you to provide the last two digits of the Payee (receiver) ID, so you have to go and check the last two digits of Pay ID and type it in the box and continue. That is all. Many users of Binance are not aware of this and that is why I bring it here.