You cannot put 2100 now to compensate for the past 3 months. However you can use a parent’s account. It has to be from your mother, father or child as per the royal thai embassy in Bern, Switzerland
David Broadfoot indeed. In Bern, I can use a financial guarantor that has money equivalent to a million baht for the financial statement requirement for this SETV, but not sure if that is true for other countries’ embassy.