Documents issued in one country to be used in another country must be authenticated (also known as legalised) before they can be recognised as valid in the foreign country.
On 18 January 2021, Singapore deposited its instrument of accession to the HCCH Convention of 5 October 1960 Abolishing the Requirement of Legalization for Foreign Public Documents (Apostille Convention). Please referherefor the details. If you require clarification on Apostilles, please contact the Singapore Academy of Law at legalisation@sal.org.sg
If you are required to legalise a US document for use in Singapore, you may wish to refer to the Office of Authentications https://travel.state.gov/content/travel/en/records-and-authentications/authenticate-your-document/office-of-authentications.html to have your documents legalized for use in Singapore. You may reach out to the US Department of State at the following addresses:
US Department of State
600 19th Street, NW
Washington, DC 20006
+1 (202) 485-8000
Please note that the Singapore Embassy is unable to Apostille documents, and that all application for Apostille has to go through the SAL or Department of State, as indicated above.Ask MFA