The act requiring mortgage lenders to give borrowers HUD booklets and good faith estimates of the closing costs is called the

http://www.hud.gov/offices/hsg/ramh/res/respa216.cfm

The act requiring mortgage lenders to provide borrowers with HUD booklets and good faith estimates of the closing costs is called the Real Estate Settlement Procedures Act (RESPA).

RESPA was enacted by the U.S. Congress in 1974 to help protect consumers from unfair practices in the mortgage lending process. One of the key provisions of RESPA is the requirement for lenders to provide borrowers with certain disclosures and information, including HUD booklets and good faith estimates.

To find the answer to this question, you could start by conducting a search engine query using keywords such as "act requiring mortgage lenders to provide HUD booklets and good faith estimates." This should provide you with reliable sources that explain the purpose and details of RESPA. Additionally, you can refer to official government websites related to housing and mortgage regulations, such as the U.S. Department of Housing and Urban Development (HUD) or the Consumer Financial Protection Bureau (CFPB), as they often offer clear explanations and resources about RESPA.