Whoa, so the inability to perceive something as weird spreads beyond direct contact? Shouldn't that be mentioned?
It is, the friend is being exposed to the object and the trade. Again there were like five extra sentences there that covered this, but reviewers felt they were excessive.
I mean, this could literally lead to a small newspaper article reading: "Woman gets amazing deal on Werewolf Tramsutation Mask for small price of her ability to walk backwards". (Not because any of that is weird, just because it's perceived as an amazing deal)
Indirect recordings of the anomaly aren't affected. If you don't see the object or talk to a person who made a trade it doesn't work. The editor probably wouldn't accept this article on that basis (unless he saw the photo first). This is a huge problem though, and why the Foundation is expending resources on trying to confiscate the items and amnesiticize the victims.
Changed the paragraph to:
Exposed persons react to anomalous properties of SCP-2523, including those of trades, entities, and objects originating from the anomaly as though entirely quotidian. This effect extends to direct conversation with affected persons as well as photographs and other direct recordings. Class W mnestic treatment combined with conscious reaffirmation of observed details can neutralize this effect.