I sent the application back in the prepaid envelope without payment. We corresponded back and forth about 4 times as AARP sought payment. They finally gave up and stopped being my pen pal. Did this about 4 times in 10 years. This also consumes clerical time and effort.
For years I sent it all back to them in their return envelope, finally I added a note to send my share of their junk mail to Harry Belafonte, their “Man of the Year”...I have not heard from them since