puchooay

They do. This is why it is important to know the difference between "visa" and "permission to stay". The 3 months vadility on the visa is the time allowed before entry into the Kingdom. What is confusing here is the date which she went to Phuket immigration. The visa holder must have know she only got 60 days on entry. She must have known how to read the stamps. Why not read when leaving immigration?