I can expect to commission the Certificate until you I buyer / tenant in my home / local?

You can not. The reason is that to advertise the label needs to identify itself (like a bar code) of your home. Article 12.2 states that the energy label "will be included in any offer, promotion and advertising to the sale or lease of the building or building unit".

more information   http://martinezdelacasa.com/energyefficiencycertificate/