Got an RFE from USCIS to submit additional evidence regarding my mom birth. Since she didn't had one so I got a NO- Entry certificate from the local municipal office and submitted with her I-485 application. Contacted the local consulate and was told that they can issue a birth certificate for my mom. Will it be OK to submit the birth certificate now after initially submitting the non -availability certificate with the I-485 application? Appreciate any inputs/suggestions.