Can an adopted person make a claim on his biological father's estate?

In certain cases yes. You need to consult with an attorney in your jurisdiction who specializes in probate law.

In certain cases yes. You need to consult with an attorney in your jurisdiction who specializes in probate law.

In certain cases yes. You need to consult with an attorney in your jurisdiction who specializes in probate law.

In certain cases yes. You need to consult with an attorney in your jurisdiction who specializes in probate law.