CA Landlords -- any laws re: accepting 6 months rent in advance?

[Terri P.]

I have a prospective tenant who is self-employed and has a 700+ credit score. No issues from his background check and no history of evictions. In his rental application, he offered to pay for a year lease upfront. My lease is for 6 months only (to reset for better seasonal demand) so it would just be 6 months plus security deposit. Are there any laws in California that would make this illegal? Has anyone accepted something similar? Do you accept cashier's check, money order, or a regular check? Would this raise any red flags on my bank account? I'm not used to dealing with this much money upfront, but it doesn't sound like a bad idea if the tenant is willing to prove he could afford the home. I appreciate your time for offering your thoughts and advice!