Legal Question in Wills and Trusts in California

Usually, no, especially when there have been name changes, etc. She should mention the daughter in the trust, and specifically state that she is to receive nothing.

Adoption under California law creates a parent-child relationship between the child and his or her adoptive parents. (Prob. Code, sect. 6450 subd. (b).) This law applies to adoptions in California. You do not say where the adoption took place. If it took place in another state, the law may be different.

If your mother prepared a trust, she does not have to specifically mention her, to not provide for her. If your mother does not have a pour over will, or a gift under a will fails, or "lapses" you may have intestacy problems. For intestate succession purposes, adoption also severs the parent-child relationship between teh adopted child and a natural parent, unless the natural parent and child lived together at any time as parent or child or the natural parent was married to or cohabiting with the other natural parent at the time the person was conceived and died before the person's birth AND the person was adopted by a spouse of the natural parent or after the death of either of the natural parents. (Prob. Code, sect. 6451 subd. (a).)

As you can see from my answer, estate planning is rather complicated. I suggest that you and your mother seek a competent attorney well versed in estate planning, and I would be wary of advice you get from the internet, and any internet "forms."