The FENSA Skills Card (MTC) can only show one FENSA Approved Installers name. If you contract to several FENSA Approved Installers, you will need a card for each FENSA Approved Installer you work with.
Alternatively, why not join FENSA yourself and have your company name on the FENSA Skills card. This way you can prove to other FENSA Approved Installers and homeowners that you are competent and you are who you say you are.