I have seen a sole provider exclusively since 2004, She is now completely out of biz so I have no references if I con tact someone new. Will this be a problem?

Some providers are newbie friendly, and have light screening. Other’s will require a photo ID, a selfie,
or both. Some also would like your Linked In page or other employment info. As usual, YMMV.

if you are new or not, all I need is  real information, check you are not some cray cray person and we are good to go.  

But he cannot get P411 without two existing 411 providers vouching for him.

Exactly. You are back at square one -- with the advantage that you at least know some of the drill.

Not necessarily always true.  I had set up a meeting with a provider through P411. We confirmed a time and place.  I have over 20 OKs on p411.  The day of our meeting she texted me informed me that she needed my personal information.  I told her that I paid $$$ for a membership so I did not have to do this....she insisted...I declined!!!  Was able to hook up with an old UTR favorite and had a great time!!!  Her gain, other providers loss!

But clicking on your user name shows ten reviews back to 2004. Not a huge amount compared to some of us on here, but even if the last provider was the one you started to see exclusively, there are still a few more providers that your saw. Some providers may be okay with your review history, but screening goes both ways.

So many providers want 100% real information even if ur P411 or have current references from well known providers. You won’t know until you ask and don’t bother arguing. They would rather be broke.  

book at least one multi-hour session per week. My guess is the more comprehensive the screening, the less likely they have problem mongers show up at the door.

P411 is the good start again we love it

A P411 membership is a good start but don't be surprised if you get requests for a selfie holding up your driver's license.