Counterfeiting or forging someone else's handwriting or seal. Using a false document like a driver's license or government ID to commit forgery.Punishment for misdemeanor forgery is a jail sentence of up to one year. You can be convicted of forgery under California law if you "knowingly alter, create, or use a written document, intending to commit a fraud. Property - What was lost, stolen, forged, or damaged. If possible, provide make, model, and serial number of any equipment. File an online police report for a qualifying incident. If you are in California, you can face criminal charges for forging someone else's signatures or even handwriting.