Applicant(s) want to prepay 1 year

[MJ Tukina]

The couple viewed the property today. Sent in apps this afternoon. They told me since they are not employed (not laid off or on unemployment), they want to pre pay 1 year of rent.
The State is in CA. Is this legal to do?

One Applicant is a Research Scientist (between projects)
The other (Mother of female) gets a monthly Disability Check and the Male is on VA Disability. They also wrote about an inheritance left to them (Mother's Mother died)

What is your advice on this, if they screen out ok. They claim to have excellent credit scores. I am going to go through NTN, after I call LL's for refs.
Also, for NTN, what type of service am I to use? Their website mentions several different services.
Thanks