Billericay MP Teresa Gorman is being investigated for a second time by MPs, following allegations she failed to declare business interests to Parliament.
The Parliamentary Commissioner for Standards confirmed the committee was looking into the Tory MP's affairs, following the claims, but would not be drawn on details.
It is the second time in two months Mrs Gorman has been under investigation by the Parliamentary watchdog.
In May, she was forced to apologise after failing to declare her own company on the register. All MPs are obliged to declare their interests to the House.
She was rebuked by the Commons Committee on Standards and Privileges for not registering her directorship and shareholding in Banta Ltd during the early 1990s. Mrs Gorman said the omission was an "oversight".
During the investigation, it emerged Mrs Gorman had not declared using one of her homes in Norwood, south London, as a business premises.
A committee spokesman confirmed: "A complaint has been received and is being investigated." Chairman Robert Sheldon MP also admitted he was in correspondence with Mrs Gorman.
Mrs Gorman declined to comment on the claims.
Converted for the new archive on 19 November 2001. Some images and formatting may have been lost in the conversion.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules hereComments are closed on this article