My personal experience with bags of any brand from/in department stores is that the typical documentation can go missing if they have been on a display stand or used as part of a mannequin display that people can touch or try on. (I always ask if they have a new one in the back for that reason, but department stores don’t always keep deep inventory of luxury bags.)
SAs will often take things out of the bag so you can try your own things in the bag for fit, and I’ve had to point out to them that they didn’t put everything back in the bag. (Happened to me the other day when trying a Bottega Veneta).
I love shopping at
Nordstrom, because of their return policies and customer service, but because they accept returns with little or no time limit (unlike most brand stores) I have found bags brought back into the store from an online purchaser, or brought back after months from someone who changed their mind after never using the bag. Those can end up back on sale without all the documentation. Once I bought the last Balenciaga bag in stock in a color I loved, and they had to scrounge for a dust cover in the back. While it could be argued whether that affects resale, I have never considered that the bag itself might not be authentic.
Others here with more purse-shopping savvy than me may tell you differently, but my opinion is if you love it and the price was great, I would not worry about authenticity of a NM purchase. I’ll keep an eye on any responses you get because maybe I’m crazy not to worry about it!
