Originally Posted by lfcfan

While waiting for my bags at the carousel, I figured it'd be a good idea to walk in at the Global Entry in IAD to update my passport info. I am too a recent LPR -> USC. Having read this thread before I knew what to ask for. I wrongly assumed I was going to be speaking with an officer. I was instead, taken the passport, asked to wait in the waiting area, returned the passport after 20 minutes, and being told "it's all done". I asked the lady who took/returned my passport if my green card info had been removed, she said yes. Two days later I log in on the website and I see both US passport and green card. ...!

I can do another walkin at some point, just that it's very inefficient. And since there's absolutely no recourse through the website, the walkin becomes pretty much mandatory.