My brother used to have a bank account more than 30 years ago in Seattle where he used to live. Being disable due to a car accident, he is unable to follow up the matter. He lives now in a nursing house in New York State. I learned from an old friend that the money in his account could have been frozen or transferred by the court in Seattle. I should appreciate your advice how to settle this problem.
They will tell you everything you need to prove ownership.
Also there is never a charge for this. The third party sites you see want to to pay for a service the state already provides.
Q. Do I have to pay a finder's fee?
An asset locator, fee finder, or heir finder is a person or company who charges a fee for helping owners receive their unclaimed property. The fee is usually a percentage of the money due to the owner.
Under Washington law, a finder may not charge a fee of more than 5% of the property value. Owners and their heirs do not need to pay a finder's fee to anyone to claim funds being held by the State of Washington.