California Code, Civil Code - CIV § 3273.21

(a)(1) “Borrower” means a natural person who is a mortgagor or trustor, or a person who holds a power of attorney for a mortgagor or trustor.

(2) “Borrower” does not include an individual who has surrendered the secured property as evidenced by either a letter confirming the surrender or delivery of the keys to the property to the mortgagee, trustee, beneficiary, or authorized agent.

(3) “Borrower” does not include an individual who has a recorded notice of default recorded against the real property that is secured by the residential mortgage loan before the beginning of the wildfire disaster unless the notice of default was rescinded.

(d)(1) “Mortgage servicer” means a person or entity who directly services a loan or who is responsible for interacting with the borrower, managing the loan account on a daily basis, including collecting and crediting periodic loan payments, managing any escrow account, or enforcing the note and security instrument, either as the current owner of the promissory note or as the current owner's authorized agent.

(2) “Mortgage servicer” also means a subservicing agent to a master servicer by contract.

(3) “Mortgage servicer” does not include a trustee, or a trustee's authorized agent, acting under a power of sale pursuant to a deed of trust.