VC 4462.5 makes it a California misdemeanor for drivers to intentionally show police a false or otherwise invalid proof of registration. Penalties include up to six months of custody in county jail (as opposed to state prison), and/or a maximum fine of $1,000. But defendants may be able to get probation instead of incarceration. Note that invalid proof of registration can take such forms as: Registration cards, identification cards, temporary receipts, license plates and stickers, temporary license plates, electronic proof of registrations, or valid proofs of registration of other vehicles