no nothing they just returned it, there was nothing else in the envelope except the certificate, and my assumption is that because it was an original birth certificate, they returned it. one of the requirement to add a newborn is to send an original birth certificate (which I did, since I had several copies)
to me the return was like an ack for me....but now its high time they send his medical request
but also I read somewhere on this forum of a similar case, everything done except the baby's medical , and it came right before the PPR request.... nothing to do but wait...good luck with yours and do update here if u hear anything.