CA estate planning laws, procedure for contesting a Will in California

It depends on the circumstances, but you should deal with it quickly. Try using LegalZoom - see link below.

The general rule, simply and somewhat vaguely stated, is that a person is legally competent to create a power of attorney if she/he has the capacity to enter into a contract. Questions to ask, include: Has a court already determined that the person is incapable of entering a contract? Does she/he understand what legal powers she is giving to another by signing a power of attorney? When explained to her, does she understand the consequences of signing, her legal rights? Can she communicate communicate her wishes, verbally or otherwise? Even a person who is highly medicated much of the time may be competent to create a power of attorney, if she has capacity at the time she creates it. The standards for capacity are different for different kinds of decisions. If you are unsure, a good start would be to consult with the person's physician.
Roberta Avrutin, Roberta Avrutin Law Offices, 8383 Wilshire Blvd., Ste 510, Beverly Hills, California 90019; 323.653.3900, ext. 115