I renewed my retirement visa in January this year.

My next 90 day check in was due in March, I assumed that this would not be necessary because of the renewal.

When I went in April to check in I was told by the staff that the two things were completely independent and I should have reported the month before and I should pay a 2,000 baht fine. However they are a very good lot at Mattaphut and they said I would not be charged so I was Lucky and now have the two running concurrently

I renewed my retirement visa in January this year.

My next 90 day check in was due in March, I assumed that this would not be necessary because of the renewal.

When I went in April to check in I was told by the staff that the two things were completely independent and I should have reported the month before and I should pay a 2,000 baht fine. However they are a very good lot at Mattaphut and they said I would not be charged so I was Lucky and now have the two running concurrently

You were lucky. Have a great day