Charities have received fraudulent emails claiming to be from the Fundraising Regulator and demanding money for the Fundraising Preference Service, the regulator has said.
In a statement on its website, the Fundraising Regulator warned that some charities had received scam emails asking for FPS money or saying that an invoice was due.
It urged anyone who believed they had received one of the fraudulent emails to get in touch.
Charities should not be asked to pay specifically towards the cost of the FPS by the Fundraising Regulator.
It is funded through the regulator’s voluntary levy, which major fundraising charities have been asked to pay.
"Please do not confuse the fraudulent email with the legitimate invoices we are currently sending out for year three of the fundraising levy," the statement said.
The regulator said its legitimate invoices were sent to organisations that spend more than £100,000 on fundraising, using the email address email@example.com.
The scam had been reported to Action Fraud, the regulator said.
A similar scam email was sent out last year, prompting fears that the regulator’s database had been hacked to obtain the email addresses of the people contacted, but the regulator said there was no evidence that it had suffered a data breach.
In response to the latest scam, the regulator’s statement said: "If you’re concerned because you have received a fraudulent FPS email, or think you might have, please get in contact with us on 0300 999 3407 or at firstname.lastname@example.org."