CA Food & Agric Code Section 23802

The failure of the seller or donor to give a written bill of sale or written instrument to the buyer or donee pursuant to Section 23801 does not have any effect upon either of the following:

(a)

The validity of any sale or contract of sale of any horse, mule, burro, or sheep.

(b)

The rights of either the buyer or donee or seller or donor of the horse, mule, burro, or sheep.