OTTAWA - The information watchdog says Canada Post has delivered only marginal improvement on its handling of Access to Information requests.

The post office received an F on its latest report card from Information Commissioner Suzanne Legault.

Canada Post was stamped with red-alert status for its poor performance two years ago.

As reported Wednesday, the CBC received an A for its processing of requests in 2011-12, up from an F for its performance two years ago.

The access law allows people who pay $5 to seek federal files ranging from expense reports and email messages to briefing notes and internal audits.

As an ombudsman for users of the law, Legault has periodically looked at whether key institutions meet their legal obligations of transparency.