Charity fundraising came under attack last week from both the Government's personal information watchdog and the national media.
The Information Commissioner's Office warned it would act against organisations that fail to respect the rights of people who receive unwanted mail, email and telephone calls.
"We will take action against organisations that breach the regulations," said Phil Jones, assistant commissioner at the ICO. The office also published Unwanted Marketing, a guidance note for individuals on how to prevent personal data being used by marketers.
Meanwhile, the Daily Mail claimed that thousands have responded to a campaign to halt unwanted mail from charities and firms.
The newspaper published a form and email address for Royal Mail's door-to-door opt-out service and details for the Direct Marketing Association's mail preference service, which allows people to reduce the amount of direct mail they receive.