Is there not also a requirement that the certificate of renewal/revalidation (whatever it is called) also be signed off at the time of the test?
So if you did your MEP and ME-IR renewal tests you should have the SEP certificate signed at the same time?
There's no "backdating" allowed, so even if you flew the MEP renewal on, say, 10th August and had the MEP cert signed, there's no way you could go back to examiner today and ask him to sign off your SEP cert because you "forgot"...