Sometimes, tax professionals need a new CAF number. This can be for a variety of reasons. The most common reason seems to be to protect the privacy of your private clients, especially if you are a tax professional working for another business.
Example: Tina is an enrolled agent working as an employee for a large tax firm. She also has some private clients that she sees at her home office on weekends. She would like to keep these two activities separate. She wants a separate CAF number for her private clients, so that when notices for her private clients are sent to her, they are not mixed up with the notices that go to her employer's office.
The solution is simple. There is no prohibition against getting a second CAF number, so you can request one. You can't "retire" your old CAF number, but you stop using it. Or you can use both. In order to request a new CAf number, the next time you submit a 2848, put "none" in the CAF # area and the IRS will issue you a new one. That's it. Very easy.