In your case you can executed power of attorney in Sydney and duly attested by Indian consulate or attorney of that country and send it your mother . The mother will adjudicate the same before district registrar . The principle need not come to registrar's office physically for registering the same. (Foreign Power of Attorney should be got stamped by the Collector after its receipt in India within prescribed time of 3 months).Write the power of attorney on plain paper. There is no need to create it on stamp paper from India, subject to conditions. Sign the power of attorney. Two witnesses should also sign this document. The addresses of the applicant and witnesses should be typed clearly. All this must be done in the presence of a notary public. You can also get this done at the Indian Consulate as well.
Steps in Court Procedure in Mutual Divorce case:
In all there are two court appearances in a mutual divorce
1. First A joint petition signed by both parties is filed in court. Secondly In the first motion statement of both parties are recorded and then signed on paper before the Honourable Court.
2. Thirdly The 6 month period is given for reconciliation, (the honourable court gives a chance to the couple to change their mind)
3. Fourthly 6 months after the first motion or at the end of the reconcile period if both parties still don't agree to come together. Then the parties may appear for the second motion for the final hearing.
4. Divorce decree will be granted as the Honourable Court may deem fit.
Your presence in the court is important from Second motion .For filing application you can use the Power of attorney.
My second question does the same rule applies in Hyderabad as well or would the ask for a registered or verified POA in India ?
All over India has same rule except Jammu and Kashmir.