Selling cattle by live weight
If you plan to sell live cattle by weight to customers either as whole animals or as a percentage of ownership, you must become a licensed Weighmaster with California State Division of Measurement Standards (DMS)
You can apply for your Weighmaster License here:
As a licensed Weighmaster, you must fill out a certificate every time you weigh an animal and provide a copy of the certificate to the customer along with the sales receipt. Another copy goes into your records, to be kept for four years.
DMS doesn't provide blank certificates for Weighmasters, but you can download one below that has been made by UC Cooperative Extension in consultation with DMS especially for this kind of transaction: