A firm must take reasonable care to ensure that every letter (or electronic equivalent) which it or its employees send to a private customer, with a view to or in connection with the firm carrying on a regulated activity, includes the disclosure in GEN 4 Annex 1 R.
If the firm is carrying on designated investment business with private customers, the FSA may request confirmation that the firm has written, or intends to write, to all private customers with, or for whom, the firm has conducted regulated activities within a certain period.