Hi! The Birkin 30 I returned was both not accurate in color but was also missing the date stamp (any markings whatsoever).
TRR has to stand behind their guarantees, there are a few ways you can handle a suspicious bag/shoe/coat/etc. One, in the case of the B30 I bought it was just flat out NOT Noir, so they really had to choice when I showed them pictures of the bag next to BLACK leather, lol. However, I kept telling them the bag was potentially fake because of other issues, and they did just keep giving the "canned responses" about their authentication process. I told them it did not matter to me because they listed the color wrong so I needed them to send me the RMA information. They did do this, and I thought they would put the Firkin back through authentication when it was returned to them but they DID NOT. It was back on the site under the same listing, still listing the wrong color.
I did get a full refund, and they did not drag it out.
Now, let's say that the only thing you are questioning is authenticity. Well it if the Birkin is missing a date stamp, or the codes are not correct for year/color/etc then you can absolutely take pictures of what you have found and email/chat and tell them you need RMA to send it back because you know it is fake and do not purchase fakes. The thing about the 3rd party auth is this: the longer you have the bag the less likely they are to help you. Every time I have received something suspect I am on the phone with them same day/next day. Think about the fact that there are HORRIBLE people out there who would get a REAL Birkin and then days later say oh this Birkin is fake, has no stamp, has messed up H zipper, yada yada, and send back a FAKE bag in place of the real bag they just received. Yes, this has happened, I am very close with my WG luxury manager and he spills all the tea.
So, moral of my drawn out story, TRR wants to drama, if you get a bag it doesn't pass the gut check, then just call them within 24 hours with your PROOF of suspicions, send the photos, and be very firm that you want a RMA to send the item back. I know of people who have done this with marked down merch (at the 40-50% off level) and I have done it with bags.
Also, I did buy a Clemence B30 from them YEARS ago, it was a steal of a price but when I got it I felt like the handles were off, the sangles seemed off, it just didn't sit right. I called got all the canned responses, but agreed to send it back to them to reauthenticate it. A week or so later they emailed telling me there people in NY had reauth'd the bag and it was AUTHENTIC, at that time they offered to send it back to me or issue me a full refund. Keep in mind, I had never asked for a refund, just a guarantee it was legit. Well, I told them to send it back to me, and I carried it for quite some time until I got a Togo B30 from Hermes and realized that perhaps the Clemence was a Firkin after all. I had become friends with my SA at H and although she once asked to hold the Clemence B30 and gave me a bit of pause in her mannerisms she kept selling me Birkins and never questioned the bag. However, in the end I reconsigned it with TRR - once they sell it to you they have to take it back one way or the other.