You can usually send up to 3,000 SGD. However, for certain amounts and transfers, you may be required to provide additional information or documentation as follows:

A National Registration Identity Card (NRIC) or a driver’s licence. If you are a foreigner in Singapore, you will need to present a Foreign Identity Number (FIN), a work permit issued in Singapore or an international passport  for sending money at a Western Union agent location.

Acceptable IDs are subject to the Central Bank of Singapore rules and regulations.