CA - Tenant & Utility Bills

[Evelyn Vazquez]

1st time renting out the home and learning a lot. Month to Month rent and no current lease/ contract expired. The utility bills under the landlord's name, but the statements are going to the renter's home. The renter was advised to open the utility bills and pay them. The landlord called the utility companies and found out they are not being paid. (landlord is my dad).

1. Is it too late to ask the tenants to switch them under their name?

2. If so, what is the appropriate timeframe to provide them with enough notice to switch them over?

2. Is the landlord legally bound to pay the utilities so they don't get turned off?