Deputy Government Spokesman Lt-General Weerachon Sukhonthapatipak said the rumours of the cash gift were spread on social media and the false information had prompted many state welfare holders to visit their banks to make enquiries about the scheme.
The government has issued state welfare cards to those who have registered themselves as low-income people.
The spokesman said the government has no plans to provide more cash to the card holders apart from the monthly allowance for cost of living and transport.
He said the government will soon open a new round of registration for low-income people eligible for state welfare.