Book closing for interest payment and redemption of government debt securities for which the Bank of Thailand serves as a registrar are as follows:

1. Book Closing for Interest Payment

Interest payment in each period is made to those whose name is registered as the owner on the last working day before book closing date. 

The book closing date for interest payment can be divided as follows:

• 30 days before interest payment date in case of savings bonds.
• 10 days before interest payment date in case of other securities.

2. Book Closing for Redemption

Principal payment will be made to those whose name is registered as the owner on the last working day before book closing date for redemption. During the book-closing period for redemption, debt securities cannot be transferred, used as collateral or pledged, as well as profile change is not allowed.

The book closing date for redemption can be divided as follows:

• 30 days before redemption date in case of savings bonds.
• 1 working day before redemption date in case of securities with a maturity of 1 year or less.
• 10 days before redemption date in case of other securities.