One of the complexities of the Vaccinated Travel Lane (VTL) when heading to Singapore for returning long-term pass holders, or tourists with no residency rights in the city, is the Vaccinated Travel Pass (VTP) application.
This confirmation of your personal (passport) details and vaccination records allows you to enter quarantine-free via the VTL for any purpose, from one of 24 countries.

If you and your travelling companions are all Singapore Citizens or Permanent Residents, don’t worry – there’s no change to the current policy and you still don’t need a VTP to enter Singapore.
A VTP is