Vincent said he had pleaded guilty to breaching the International Cricket Council's (ICC) anti-corruption code by not reporting the approach while playing in the scandal-tainted Bangladesh Premier League (BPL) last year.
"I confirm I rejected this approach at the time. There is no allegation or suggestion that anything untoward occurred beyond the approach itself," Vincent said in a statement.
The 35-year-old, who played in 23 Tests and 102 one-day internationals for New Zealand, added: "I have no involvement in any of the matches, or matters involving the other parties which were the subject of recent hearings and investigation in Bangladesh."
New Zealand Cricket chief executive David White declined to speculate on what sanction he could face but said authorities took any infringement linked to corruption seriously.
"We're concerned that a former New Zealand player has been linked to the ICC's Bangladesh Premier League investigation," he told Radio Sport.
"Of course, we're a strong advocate of the ICC's anti-corruption protocols and we treat this matter very seriously.
