California Vehicle Code §4461(a) makes it unlawful to use a handicapped placard fraudulently. There are generally several different acts that would be punishable under this code section.
The first is if a person who has been authorized to use a handicapped placard lends it to another who is not authorized for its use. Additionally, a handicapped person shall not knowingly allow the use of the handicapped placard by another that is not authorized for its use.
The relevant code section has outlined the potential range of consequences if a person is convicted for allowing the use of an unauthorized handicapped placard. They could be penalized under a civil penalty of anywhere between $250 to $1000 and may also be charged as a misdemeanor with a fine between $250 and $1000 and/or imprisonment in County Jail anywhere up to six months.