The group said the letter was sent to them anonymously.

However, the one they wanted had sent in their voice clip anonymously.

A copy of the form was recently sent anonymously to news organizations.

What you see is a letter that was sent to us anonymously.

Samples of the tumor were sent anonymously to the army medical museum.

A year later a tape was sent anonymously to a royal correspondent on another newspaper.

People concerned about privacy can anonymously send e-mail and surf the Web.

The first was released in litigation, and others, all on company stationery, were sent to the groups anonymously.

"Two condemned people were executed today," read the announcement sent anonymously to the press on Friday.

The files were sent anonymously, there's no way to authenticate their origin.