The Helping Families Save Their Homes Act (S 896) was signed into law on 5/20/09. Section 404 included an amendment to the Truth In Lending Act (TILA). It created a new section 131(g) of TILA and it amended section 130(a) of TILA.
See
this thread .
The notice had to be sent for any loans sold on or after 5/20/09. The notice has to be sent no later than 30 days after the sale. So the earliest a notice would have been required was 6/19/09.
See
this thread for information about the sample notice Fannie Mae will send if you sell loans to them. Freddie Mac has said it will send a notice when it buys loans but they have not yet posted samples.