I got the same letter in the mail today from california service center.
"The above petition (i-130) has been approved. The petition indicates that the person for whom you are petitioning is in the United States and will apply for adjustment of status. The evidence indicates that he or she is not eligible to file an adjustment of status applications. This determination is based on the information submitted with the petition and any relating files."
"Because the person for whom you are petitioning is not eligible to adjust, we have sent the approved petition to the Department of State National Visa Center (NVC), NVC processes all approved immigrant visa which consular post is the appropriate consulate to complete visa processing. NVC will then forward the approved petition to that consulate. This completes all USCIS action on this petition. If you have any questions about visa issuance, please contact NVC directly. Please allow 90 days before contacting the National Visa center regarding your petition. The NVC will communicate with the person for whom you are petitioning concerning further immigrant visa processing steps. "
However, I am now on H1B status( I wrote this on the forms). I initially entered the US on F1. It says on the letter that i should contact my local USCIS office which is about 5hours away from where i live if i believe i am eligible to adjust status here in US. I already sent my I-485 forms on Aug 27th and am still waiting for receipt notice( which i as well thought that was strange cause its been over a week)
You should be fine. This is a standard letter you get from USCIS when you do not include documents ( such as I-20, 94, passport with visas etc.) that prove the legal immigration status of the beneficiary with your 130 application. That is why it is stated on the letter that this is based on evidence provided with your application.
The few persons I have spoken with who had this type of language on their approval letter confirmed to me that they never submitted documents evidencing their status. THat was same for me as well....
If you submitted these documents with your application, then your situation maybe different. Question is did you submit these documents with your form 130 application?
My case maybe similar to yours in the sense that my 130 approval came when I had already submitted my form 485, however we differ in the fact that my 485 had already been accpeted before 130 approval. WHen I finally received my 130 approval notice with the language on it that I was not eligible for AOS in the US, I was concerned and I called USCIS and spoke with a level 2 officer who told me that the fact that my form 485 has been approved is a clear indication that I am eligible for AOS in the US. He said when they receive your form 485 the first thing they check for is your eligibility to adjust. If you are not eligible, the application will be denied instantly and returned to you with your check.
FYI: I am done with biometrics and my current status for 485 is now showing ready for testing and interview. I have not received no RFE so far which I presume everything is in order given the fact that quite a few F2A applicants have received RFE in the last couple of weeks.
Hope my 2 cents are helpful....