I've definitively exhausted all my options for getting any communication back, and given that the status is still:
Your enrollment is being processed. Your enrollment ID is H9V8P25F67
it seems there's nothing left to do but wait and hope the situation resolves itself somehow.
In the meantime, here's some information that might be useful to other developers.
I obviously don't have any definitive answers, and everything below is just my opinion based on personal experience, but:
1) Be aware of how Firstbase.io actually works
I paid for their LLC registration service on January 10, 2026.
In the Firstbase dashboard, they state that they obtain the EIN within 30 days on average:
After 30 days, I still hadn't received my EIN and had to contact their support. Some time later, they sent me an EIN assignment fax confirmation.
I made a mistake by using it for DUNS and Apple Developer registration. The fax confirmation doesn't contain my name — it only shows the agent's name. Even if you're on a tight deadline and want to ship your product faster, it's better to wait for the official CP 575
The email said:
"The official EIN letter (CP 575) will be sent to your Mailroom within approximately two weeks."
As it turns out, the official CP 575 letter arrives much later. In my case, it came on March 25, 2026 — 74 days after registration:
Please keep this in mind when planning your product launches.
Based on my own experience, the timelines Firstbase shared with me turned out to be longer in practice, and from what I've read online, I don't seem to be alone in this.
2) If someone else on your team handles Android (and it's not you), don't let them get a DUNS number before you've set up your Apple Developer account.
Here's why: a DUNS number is also required to register a Google Play Developer Account. If your Android developer requests one for the company, their name can get recorded as the Key Principal on the DUNS profile. Later, when you try to enroll in the Apple Developer Program under your own name, Apple will see a mismatch between the name on your enrollment and the Key Principal on the DUNS record — and your application may get blocked.