As used in this chapter, unless the context otherwise requires, “collection agency” means any person, partnership, corporation, association, limited liability corporation, or firm which engages in the collection of delinquent accounts, bills, or other forms of indebtedness owed or due or asserted to be owed or due to another or any person, partnership, corporation, association, limited liability corporation, or firm using a fictitious name or any name other than its own in the collection of their own accounts receivable, or any person, partnership, corporation, association, limited liability corporation, or firm which solicits claims for collection or any person, partnership, corporation, association, limited liability corporation, or firm that purchases and attempts to collect delinquent accounts or bills.