KUALA LUMPUR, Aug. 19 -- Thai authorities are investigating whether the famed Raan Jay Fai restaurant in Bangkok overcharged a customer for its signature crab omelette, after a social media influencer claimed she was billed 4,000 baht (RM520) for a dish listed at 1,500 baht.

According to the Bangkok Post, the Department of Internal Trade will look into whether the Michelin-starred restaurant violated pricing rules, with deputy director-general Udom Srisomsong confirming that the operator could face fines of up to 10,000 baht for overcharging and a further 10,000 baht for failing to display prices for special dishes.

Officials plan to contact PEACHII, a London-based Thai YouTuber with 1.6 million followers, who first raised the complaint...