Matt Driscoll claimed that "blagging", or impersonating a third party, was used to secure the confidential information after receiving a tip that [Alex] Ferguson might be suffering from ill health. The former journalist added: "I was told sometimes you'd get a situation where if an investigator sent a fax to a GP or a hospital saying 'I'm his specialist, I need these details' it was incredible how often that would just get sent straight back."
Source: wiktionary