‹ Interest charge computation on credit cards_27 August 2019 Contactless Payment Transactions_18 August 2019 › Issuance of the new High-Level Controls Module for Ancillary Service Providers_21 August 2019 Click here to download the Letter in PDF format. Click here to download the Letter in PDF format. Click here to download the High-Level Controls Module in PDF format. ‹ Interest charge computation on credit cards_27 August 2019 Contactless Payment Transactions_18 August 2019 ›