Unless another method of levy is provided, to levy upon a general intangible, the levying officer shall personally serve a copy of the writ and a notice of levy on the account debtor. (CCP 700.170)
"General intangibles" consist of a right to payment and means any personal property (including things in action) other than goods, accounts, chattel paper, documents, instruments, investment property, rights to proceeds of written letters of credit, and money. All rights to payment earned or unearned under a charter or other contract involving the use or hire of a vessel and all rights incident to the charter or contract are accounts. (CCP 680.210; COMM 9102(a)(42))
“Account debtor” means the person who is obligated on general intangible.
(CCP 680.120; COMM 9102(a)(3))
If a levy is made by serving the account debtor and payments on the general intangible are made to a person other than the judgment debtor (whether pursuant to a security agreement, assignment for collection, or otherwise), if so instructed by the judgment creditor the levying officer shall personally serve a copy of the writ and a notice of levy on such third person. Such service is a levy on any amounts owed to the judgment debtor by such third person.