The Charity Commission is looking into a complaint that the political campaigning organisation tonyblair4labour.org has a data protection policy that allows it access to details of supporters of the Tony Blair Africa Governance Initiative, a charity set up in 2009 to help African leaders tackle poverty.
Greg Hands, Conservative parliamentary candidate for Chelsea and Fulham and a shadow treasury minister, has written to the regulator pointing out that the website sends emails to people urging them to vote Labour. He said the potential existed for the charity's supporters to be sent these emails.
A statement on tonyblair4labour says: "Other organisations, specifically the Tony Blair Africa Governance Initiative, process personal data collected through our website." It also says the charity is "a data controller of your personal data".
The data protection policy on the charity's website also says supporters' details can be transferred to "other organisations connected with Tony Blair."
A spokeswoman for the Charity Commission said it was assessing the complaint but had not launched a formal investigation into the charity.
Nobody from the charity was available for comment.