There are two possible approaches that can be taken with the green and red channels approach.
In the first approach, one could start by treating every entity that sends A2P SMSes on the green channel. Green channel messages are not stopped or delayed. Then, as complaints come in, the rate at which messages are delivered is slowed – thus impacting the business. As complaints mount, the rate will come down to zero. On the other hand, messages from companies with a clean record can keep whizzing through the green channel.
In the second approach, it would work in the opposite way. Every message would be scanned – the equivalent of passing through a red channel. As messages show up clean, the scanning is reduced. If complaints come in, then messages stay in the red channel longer.
There are three things that are needed to make this happen.