User blog comment:Zack Tan/Volume 7 Intermission/@comment-138.162.0.41-20150903140211/@comment-26932361-20150905025343

Even if PDL learned that Momon = Ainz there is no way he could link Shalltear to Nazarick, how exactly could he possibly deduce that? he has no clue or evidence remotely that she is connected to Nazarick all he knows about her is that she is from YGGDRASIL and that's it, he hasn't even confirmed that Nazarick is from YGGDRASIL in the first place and even if he did so what? just because the vampire he fought was from there doesn't mean that every other entities or players are all working together, it's far more likely that he could come to the conclusion that Momon/Ainz is hostile to the vampire and that's way he chased her in the first place and defeated her, not only that but a simple information gathering could tell him about what Momon said to the others at the guild such as the fact that he knows her and that he was chasing her and also Momon told them that there were two vampires he was chasing not one, so how would he immediately come to the conclusion that the vampire Momon defeated is the same one he fought and not the other vampire instead? he can't possibly come to a simple conclusion that the vampire was working with Ainz but instead much more likely for him to deduce that they were enemies.

Even if he somehow believes that Momon is a fraud, there is simply no way in hell he could undo all what Momon did, the possiblity of an enemy doing such a thing was already disscused in Vol.4 when Ainz asked Demiurge about what would happen if the enemy finds out Momon's identity and he told him that they would try to expose his identity and to dismiss him before he could get any more famous because if he did then they wouldn't be able to do any damage to his reputation as people would just dismiss anything they say about him as nothing more than malicious rumours so they have to do it before Momon achieves more and becomes well known and respected, which we are way past that point right now.

If anything if PDL finds out that Momon is Ainz somehow from the revived corpses it will actually have the exact opposite effect, he may deem Ainz as not a threat but somebody who is useful to the world, because if he did basic information gathering about Ainz he will know that the first time he appeared and became known in the world is when he saved Carne Village from being slaughtered by the Slane Theocracy, if he finds out that he is Momon then he would know that he also saved the entire city of E-Rantel from a psychopathic former black scripture member (PDL is hostile towards black scripture as shown in the inter chapter) and one of Zuranon leaders who wanted to turn the entire city into an undead city, he will realize that Ainz as Momon got rid of the dangerous vampire that he fought or atleast another one, also saved the entire kingdom from being destroyed by Jaldabaoth, which he will probably investigate about to gain more info most likely from Evileye his comrade since she was there in the middle of it, Evileye who is infatuated with Momon will tell him that Momon not only saved the kingdom but saved her as well from being killed by Jaldabaoth.

So if anything with all that said, he may actually end up having a favorable impression of Ainz given everything he did thus far, not only that but at the end of Vol.9 it is stated that the territories that Ainz and Nazarick acquired from the war is being ruled peacefully and is actually prospering more under their rule.