A Labour source suggested previously the reference to Mr Reynolds being a solicitor on social media was "human error" and said Mr Reynolds did not manage the profile.
He told a crowd in Cornwall: "Jonathan Reynolds, who's never had a proper job in his life, who tells us he's a solicitor when he's never been qualified, which is a criminal offence.
Jonathan Reynolds faced calls to resign after accusations he described himself as a solicitor on several occasions - including on his LinkedIn page, in the Commons and on an old constituency website that is no longer online.
Speaking to journalists on a trip to India, Mr Reynolds said: "I've never presented myself as a qualified solicitor.
Andrew Griffith, the shadow business secretary, renewed calls for Mr Reynolds to resign following his apology, saying he was "making excuses".
