A
An in-principle approval (IPA) is one of the requirements for getting foreign workers to Singapore.
You will get an IPA letter when your Work Permit application is approved.
The validity of the IPA will be mentioned in the letter. This is the window you have to bring the foreign worker to Singapore.

You can extend the IPA for up to 1 month if you need more time. You are allowed to extend the IPA only once.
To extend an IPA, log in to WP Online to make the request at least 1 week before the IPA expires.
If approved, you can print the extended IPA online.