Estate Law Questions? Ask an Estate Lawyer.
The confidentiality agreement is no longer valid since your mother has passed. You can attempt to send a certified copy of the death certificate to the firm/paralegal in AZ to whom you spoke. If she refuses to give you a copy, which she can refuse, then your only recourse is to contact the probate court in AZ where your mother dies to see if the estate is still in probate as it should be and file a claim to ascertain your rights/inheritance.
14-2516. Custodian of will; duties; liability
A. After the death of a testator and on request of an interested person, a person having custody of a will of the testator shall deliver it with reasonable promptness to a person able to secure its probate or, if none is known, to an appropriate court.
B. A person who wilfully fails to deliver a will as required by this section is liable to any person aggrieved for any damages caused by this failure.
C. A person who wilfully refuses or fails to deliver a will after being ordered by the court in a proceeding brought for the purpose of compelling delivery is subject to penalty for contempt of court.
As her child, you are an interested person and have a right to get a copy of the will.
I hope this information is helpful.