If you are accused: have the allegation, period, installation and value checked in an organised way.
If you are facing a complaint or summons for taking energy, have the facts organised before making a statement. The relevant issues include the specific installation, the alleged taking, the period, the value and the allegation that you intended to obtain an unlawful benefit for yourself or another person.
Preserve the documents that already exist and do not alter the installation afterwards. A lawyer can assess what was actually established and which conclusions can properly be drawn from it.