i ask about the self declaration with notary

We would like to inform you that Power of attorney is a legal document issued by a person named "client" to a person named "Agent" and issued by the Office of the Notary,

 It is a department of the Judicial Service charged with authenticating the documents required in legal and commercial transactions. Power of attorney can be two types:

1. Public power of attorney, as the name shows, authorizes the agent to carry out any kind of work on behalf of the client. This type is usually required in public transactions

2. Special power of attorney (also known as a specific power of attorney) where the agent is authorized to carry out the activities mentioned exclusively there. special power of attorney is required in transactions, and for more information, you may follow this link: 

E-Notary System

As for self-declaration with the notary, you may access this link which is dealt with in all emirates of the country:

Tax Dispute System