You can submit a FOIA request for your immigration file.

Withdrawal of COS I-539 application

Once you depart the US you may request the withdrawal.

Will I have a chance to be accepted for a green card with a k1 visa, without having a wedding ceremony?

No you must marry your fiancé within 90 days of your entry.

I agree with my colleagues. The affidavit of support is not required in your situation.

I have completed my naturalization application and intend to get married soon. Would this be a problem during my interview.

No this should not be an issue and you can inform the officer of change at time of interview.

I-751 Receipt Notice?

You can email the lockbox support for more guidance but there are delays with accepting cases.

Yes the I551 stamp is sufficient for travel purposes.

This is a matter for state rules and the DMV in TN.

Unfortunately this alone does not provide eligibility for permanent residency.

The birth certificate is sufficient so secondary evidence shouldn’t be needed.