https://policies.google.com/terms/information-requests
"In all cases: Issue a subpoena to compel disclosure of basic subscriber registration information and certain IP addresses
In criminal cases:
Get a court order to compel disclosure of non-content records, such as the To, From, CC, BCC, and Timestamp fields in emails
Get a search warrant to compel disclosure of the content of communications, such as email messages, documents, and photos"
Some 3rd parties require warrants. I tend to think that this is the rule rather than the exception.
https://policies.google.com/terms/information-requests
"In all cases: Issue a subpoena to compel disclosure of basic subscriber registration information and certain IP addresses
In criminal cases:
Get a court order to compel disclosure of non-content records, such as the To, From, CC, BCC, and Timestamp fields in emails
Get a search warrant to compel disclosure of the content of communications, such as email messages, documents, and photos"
Some 3rd parties require warrants. I tend to think that this is the rule rather than the exception.