http://www.ancestry.com/cs/legal/lawenforcement
From Ancestry.com:
"
Law Enforcement Requests in the United States
Ancestry will release basic subscriber information as defined in 18 USC § 2703(c)(2) about Ancestry users to law enforcement only in response to a valid trial, grand jury or administrative subpoena.
Ancestry will release additional account information or transactional information pertaining to an account (such as search terms, but not including the contents of communications) only in response to a court order issued pursuant to 18 USC § 2703(d).
Contents of communications and any data relating to the health or DNA of an Ancestry user will be released only pursuant to a valid search warrant from a government agency with proper jurisdiction.
If we receive a valid request under U.S. law to preserve records that constitute potentially relevant evidence in legal proceedings, we will preserve, but not disclose, a temporary snapshot of the relevant account records for 90 days pending service of valid legal process as described above.
How We Respond to Legal Requests
Respect for the privacy and security of our users account data drives our approach to complying with legal requests for information. When we receive a request our team reviews it to make sure it satisfies legal requirements and our policies. If we believe a request is overly broad, we will try to narrow it to the extent legally permitted."