Cal. Rev. & Tax. Code § 2910.5

When taxes on unsecured property are paid in cash or whenever a receipt is requested at the time of payment by the person paying the tax, the tax collector shall give a receipt to the person making payment, specifying:

(a)The name of the assessee.

(b)The amount of the assessment.

(c)The amount of tax paid.

(d)The beginning and ending of the fiscal year for which the tax is paid.