Plainclothes police and military officials will be sent to monitor major lottery markets to ensure tickets are sold at no more than 80 baht a pair as prices have begun to increase again.
Overpriced lottery has been a perennial problem in Thailand and the junta made it one of its priorities after it took power in 2014.
Lt Gen Apirat Kongsompong, chairman of the Government Lottery Office (GLO), said on Tuesday officials had arrested 1,500 vendors for overcharging during crackdowns on Oct 30-31 this year.
To solve the problem, military and police officials will be sent to man stalls at major retail sites such as Khok Wua intersection in Bangkok and Sanambin Nam in Nonthaburi province.
Forces are also being prepared to tackle lottery rematch operations, where tickets of same digits from different series were regrouped to be sold in sets for a premium to people seeking to boost their luck.
The practice was outlawed because it drove up demand for certain numbers and therefore their prices.
Another measure was for the joint forces to crack down on underground lottery rings.
As well, the GLO is planning to change the way tickets are sold.
Currently, tickets are sold in pair of the same number for 80 baht a pair. Each ticket has the face value of 40 baht but in practice nobody buys them separately so the double ticket no longer makes sense.
To reduce costs, the GLO plans to replace the pair with a single ticket costing 80 baht. The change won't affect buyers in any way because the number of issued tickets is also the same, at 60 million.
In addition, contract terms with suppliers will be reduced to six months and a clause added so quota owners of overcharged tickets may lose the right.
Another measure was to change the time the tickets are sent to middlemen to make it impossible for them to rematch them in sets.