刚收到批准信，pr给父亲申请，信里明确写需要额外申请签证可能是近期新加的要求吧。。。 5 If you hold a visa-required passport/travel document, you would need to separately apply for and obtain a valid Singapore visa prior to your departure. Please submit your visa application via ICA’s e-service through a local contact/ authorised visa agent with this Approval Letter for Entry as a supporting document, 2 working days after obtaining this Approval Letter.