Is this irrevocable poa even after death of doner

DEAR,

IN BOTH THE CASES THE POA STANDS VALID AS IT IS IRREVOCABLE AND SO A HAVE GIVEN IRREVOCABLE POWER TO B. WHICH CANNOT BE CANCEL UNTIL AND UNLESS THERE IS ANY PROVISION IN THE POA ITSELF. POA CAN BE WITHOUT CONSIDERATION. 

NOTE - THE POA MUST BE REGISTERED.

As per my understanding of the law there cannot be a Sale without consideration. Therefore, the principles of agency coupled with interest shall not apply. Such Powers of Attorneys in absence of consideration are revocable and can be unilaterally withdrawn.

thanks for opinion sir,

Further, what may be the consideration. Can it be as low as Rs. 1/- or it should be fair market value?

What is the process of registering irrevocable power of attorney. Shall the registration charges be that much as is required to register the sale of property. I think, registration charges shall be considerably low as it is not a sale of property   

As far as I understand a POA stands cancelled after the death of Principal, so if there was any transaction by the POA agent subsequent to the death of the Principal, it is invalid by law.  Check up the details available in the recital of the said deed, see how it has been drafted and what are its effect and proceed after fully clarifying the entire issues involved.

A further clarification on the subject is that there is no word called donor or donee in a Power of Attorney Deed.  The person(s) executing a POA deed in favor of another person(s) is called a Principal(s) and the other one is called his Agent(s).  Why I am insisting on this definition is that a principal can appoint his attorney/agent for some specific or general purpose to perform certain acts on behalf of the principal during his absence as if the principal himself himself has done it.  This will remain effective only during the life time of the principal and more on this is that the principal can cancel/revoke the powers given to his agent any time during his life time.  Whatsoever, the Principal(s) cannot give power to an agent/attorney  on behalf of his legal heirs/successors without having been authorised to do so by the said heirs/successors and also he cannot give powers to an unknown person, here the unknown person is the legal heir/successor of the agent/attorney.  In the event of death of a principal, the POA deed stands automatically cancelled while the other principals have to execute a fresh POA deed favoring the existing Power Agent/Attorney.  Thus the donor/donee word donot find place in a power of attorney deed, hence I think your query in this regard is actually different from what your contents denote, please confirm.