Can I ask for employment verification when renewing a lease?

[Tomer Maoz]

Hello,

I have a rental property in Oakland CA, and a few of my tenants will be renewing their lease in the next few months. I'm interested to know if I can legally ask the tenant to provide proof of employment when renewing a lease and if it is a good practice?

The tenant always paid on time, but due to the current situation, I want to be extra careful and make sure they will have enough income to pay the rent.

Thanks,

TM