Hi Mark. Payments for Super must now comply with SuperStream requirements. This means that the return must be sent electronically and in a standard format. The ATO has its own Clearing House - Small Business Super Clearing House, which can generally be used by small employers with up to 20 staff. There are many other Clearing Houses around, many run by Super Funds themselves, as a central point for all of the payments that an employer has to make.
John L G