JUNKFAX

Set to 4 different clues across 4 published puzzles, most often “It's prohibited by the Telephone Consumer Protection Act of 1991” — The New York Times, Saturday, 26 January 2008.

7 letters

Every clue on record, most used first

It's prohibited by the Telephone Consumer Protection Act of 1991once
The New York Times — Saturday, 26 January 2008
Unwelcome messageonce
The New York Times — Saturday, 12 October 2002
Arrival that may annoyonce
The New York Times — Friday, 10 August 2001
Unwanted office transmissiononce
The New York Times — Saturday, 23 October 1999