The article states that Staveley's group haven't signed an NDA, but that three other interested parties have. Would copy the article across, but difficult on my phone.
I've just read it there mate, I was going off what the guy tweeted.
Heres the (small) article:
Newcastle interest grows
There are three separate groups of potential investors conducting due diligence at Newcastle United in addition to PCP Capital Partners, which is run by Amanda Staveley, who held informal talks with club officials at St James’ Park last weekend. Unlike PCP, the other interested parties have signed non-disclosure agreements and are pushing for a quick deal, ideally before the next Premier League TV rights package is completed in February, which they all expect to have an inflationary effect. Mike Ashley, the owner, also wants a quick sale as he is keen to avoid an outlay in the January transfer window on an asset of which he is in the process of disposing, having conceded that Newcastle’s squad requires strengthening