Since the introduction of the SBEM v3.5.b calculation engine it has no longer been possible to produce an EPC through software that does not contain a watermark, regardless of full energy assessor details being entered.
To produce an EPC without a watermark, you must first lodge the EPC's XML file with the Landmark Registry. After the EPC is lodged, it is possible to download a document that does not contain a watermark.
For information regarding this or other policy decisions for the SBEM calculation engine, contact either your accredited scheme provider or BRE directly.