Simon Dyson could face a three-month suspension from the European Tour after being charged with a serious breach of the rules and summoned to appear before a disciplinary committee in a fortnight.
David Garland, director of tour operations, decided that extra investigation was necessary after the Yorkshireman was disqualified last week for tapping down a spike mark with his ball in the third round of the BMW Masters.
After an initial report that claimed he had "no recollection" of the incident, rules officials are understood to have collected evidence on other violations of which Dyson, a six-time winner on Tour, has been accused this season.
The three-man committee deciding the 35-year-old's sanction will comprise a lawyer, a former player and an administrator, and are likely to meet soon after this month's season-ending World Tour Championship in Dubai.
In the meantime, Dyson will play as planned in Turkey next week.
Dyson said in a statement last night: "I would like to say that I have never deliberately broken the rules, either on this occasion or in the past. It was simply an accidental mistake, which I have no reservations in apologising for – particularly to my fellow professionals and to the Tour for any embarrassment caused."