HIPAA Privacy Notice - Why are you asked to sign a form?

Here is what HHS says about signing:

Acknowledgement of Notice Receipt. A covered health care provider with a direct treatment relationship with individuals must make a good faith effort to obtain written acknowledgement from patients of receipt of the privacy practices notice.54 The Privacy Rule does not prescribe any particular content for the acknowledgement. The provider must document the reason for any failure to obtain the patient’s written acknowledgement. The provider is relieved of the need to request acknowledgement in an emergency treatment situation." -- "Summary of the HIPAA Privacy Rule," OCR Privacy Brief, Office for Civil Rights (HHS), Last Revised 05/03.

54 45 C.F.R. § 164.520(c).