I was a power of attorney to my employer during my service. The POA is issued on the date of such appointed posts for acting on behalf of the organisation, giving some powers for and on behalf of the organisation. In which, representing the organisation in Court /filing cases/ attending litigation is one. Any official who is having power of attorney can represent the organisation.
As far as POA in consumer court is concerned notarised POA is sufficient, but it should be signed by those authorities who can delegate/authorise officials. It is being duly registered at the HO of the organisation. After giving POA, it is kept in the head office, and on specific request of the official it will be sent for that specific purpose and should be kept in safe custody of HO. (For operating bank accounts, for legal proceedings and depending on nature of organisation there may be several powers delegated through POA)