The Northern Ireland international, 28, was charged on 29 July with breaching FA rule E8, which bars professional players from betting on football-related matters.
The offence took place on 20 February.
Lafferty made one league appearance for Norwich last season, and played six times for Birmingham City on loan.
He was an unused substitute as Norwich started their Championship season with a 4-1 win over Blackburn on Saturday.
Rule E8 prevents professional players not only from betting on matches in which they are involved or have an influence, but also on any other football-related matter anywhere in the world - including matches, the transfer of players, employment of managers, team selection or disciplinary matters.

27 June 2016 Last updated at 16:41 BST
Even though the UK as a whole voted to leave the EU, in Scotland most people voted to remain.
Now, some people are saying that Scotland should get independence from the rest of the UK, so that it can join the EU again on its own.
Naz has been in Scotland to see what kids there think.

The 18-year-old midfielder, who has signed a three-and-a-half-year deal, was the subject of a rejected bid from Newcastle United earlier in the month.
BBC Sport understands the deal does not include a buy-back option.
The highly-rated youngster, whose Old Trafford contract would have run out this summer, was part of United's FA Youth Cup winning side last year.
But United boss Sir Alex Ferguson recently branded Morrison's contract demands as "unrealistic".
Ferguson handed the Wythenshawe-born player his senior debut in the Carling Cup in 2010 against Wolves, but the youngster has also had a chequered history off the pitch.
Two days after winning the 2011 FA Cup Youth final, the 18-year-old was fined £600 by a court for throwing his girlfriend's mobile phone through a window during an argument.
And Ferguson is hoping a change of scenery will help Morrison put his off-field problems behind him.
"In the case of Ravel it's been quite well documented," said Ferguson. "I think he's better out of Manchester.
"He's got a great talent but it's how to deal with it that is important."
Morrison told the Hammers website: "I'm really pleased to have signed. The move has happened very quickly and I'm looking forward to hopefully moving up to the Premier League with West Ham soon.
"I'm an attacking player and I'm hoping to get the fans on their feet."
Norwich City striker Kyle Lafferty has been fined £23,000 and warned as to his future conduct after accepting a Football Association betting charge.
[NEXT_CONCEPT]
One of the biggest questions to come out of the historic decision that the UK should leave the European Union is about the future of Scotland.
[NEXT_CONCEPT]
West Ham United have signed Manchester United's Ravel Morrison for an undisclosed fee.