May I transit in Singapore if I am blacklisted from entry?

One year ago, I was refused entry into Singapore and they told me that if I want to enter in the future I will need to apply with a letter to Immigration. I would like to travel to Indonesia and I am going to buy my tickets. The cheapest tickets are all transiting in Singapore.
Could they refuse me transit through Singapore (on the way to Indonesia) and deport me to where I came from? Do they check passports on connecting flights?
Best Answer
With Singapore, unlike the US, passengers who transit don't go through customs and immigration, thereby you will be OK to transit, provided you do not leave the airport i.e. go through customs and immigration. The only time they check your passport during transit, is for ID verification alongside your boarding pass.
The safest option is to call your nearest Singapore Embassy/Consulate, and explain your situation as yourself, or alternatively you could contact your airliner.
Furthermore it might be good to have a record on when and who you spoke with at which Singaporean Embassy, should you have any problems while transiting.
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Can I transit through Singapore unvaccinated?
Customers transiting through Singapore Changi Airport can learn more about the transit experience on this page. Travellers, regardless of vaccination status, are allowed to transit through Singapore on all Singapore Airlines flights as long as they meet the entry requirements of their final destination.Has Singapore banned transit passengers?
Singapore is open to all transit travellers with no specific COVID-19 regulations or requirements.Do I need approval to transit in Singapore?
Foreigners transiting in Singapore will not require visas if they remain within the transit area of Changi Airport (Terminals 1, 2, 3 and 4) and do not pass through Singapore Immigration.Do you need a negative Covid test to transit through Singapore?
Take a pre-departure Covid-19 test Please note that while travellers may not be required to present a negative pre-departure test result to transit through Singapore, they may still be required to produce a valid negative Covid-19 test certificate if it is required for entry into their planned destination.Singapore Transit | Transit through Singapore Changi | All you need to know today
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