Banking Definitions
ACH
Each day, banks and corporations all over America gather ACH (Automated Clearing House) withdrawal and deposit requests into batches and send them to the centralized Automated Clearing House at set times. From there, the Clearing House sends the credit or debit transaction requests out, generally the following day. This system isn't the fastest. It can sometimes take several days for a payment or a deduction to clear. However, this is a low-cost system (most ACH transfers are free or only a few cents per transaction). It is one of the only USD domestic payments always to be credited in full.
Fast and Secure Transfers
Fast and Secure Transfers is an electronic funds transfer service that enables customers of the participating banks to transfer Singapore Dollar funds from one bank to another in Singapore almost instantly. There is a S$200,000 maximum payment limit for this transaction type.