That green basket weave paper is a stock paper without any boarders. I recently sent for a Certified copy of my BC from Idaho. It came on that same green basket weave as the FAKE Obama COLB and the same green basket weave as the REAL DeCosta COLB. The difference between mine and their's though, is mine had the original ledger card in my mothers writing with all the pertinate info, and the doctors signature. I was born at home. This was then COPIED onto that green basket weave paper. Stamped with an embossed seal and dated and signed. Saying it was a Certified copy of the original.
Is the basket-weave pattern visible behind the words "CERTIFICATE OF LIVE BIRTH" on the DeCosta COLB? It's hard to tell in any of the scans I can see. It is conspicuously absent from the Obama cert, in a fashion which would not make any sense if the top heading were not preprinted on the form.