In this task, you are given a summary for US Congressional and California state bill, your task is to generate a Title for this bill. The preferred titles are under forty words and mention the purpose of the bill.

Taxpayer Abuse and Harassment Prevention Act of 2007 - Amends the Internal Revenue Code to repeal the authority of the Secretary of the Treasury to enter into contracts with private collection agencies to collect unpaid taxes.
To amend the Internal Revenue Code of 1986 to repeal the authority of the Secretary of the Treasury to enter into private tax collection contracts.