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Civil Aviation Authority of Singapore

Certificate of deregistration

Learn about deregistering aircraft in Singapore and how to apply for a Certificate of Deregistration.

Last updated 14 May 2026

A Certificate of Deregistration is an official document to show that an aircraft has been removed from the Singapore Aircraft Register.

Upon deregistration, the aircraft’s Certificate of Registration will be cancelled.

If the importing State’s aviation authority requires an Export Certificate of Airworthiness to register the aircraft, apply for "Deregistration + Export Certificate of Airworthiness" on eSOMS.

Application process

Who can deregister

The holder of the aircraft’s Certificate of Registration can apply for a Certificate of Deregistration.

If there is a recorded IDERA or CDCL against the aircraft, refer to IDERA and CDCL - Transferring the right to deregister and export an aircraft. 

When to deregister

An aircraft must be deregistered in any of the following situations:

What are the fees

There are no fees to apply for a Certificate of Deregistration.

What is the processing time

Processing timelines vary by application type and are set out in IC 6/2025 Information circular on service standards for processing of aviation safety instruments related to airworthiness, flight operations and training organisations.

You are encouraged to engage CAAS early to discuss your Certificate of Deregistration application to facilitate timely processing.

How to apply

Phase 1: Pre-application

Notify CAAS of your intention to deregister your aircraft.

Phase 2: Formal application

Fill in and submit your application on eSOMS together with the required documents. The required documents are:

  • details of the owner and operator

  • evidence that the aircraft’s nationality and registration marks have been removed

  • evidence that the aircraft owner’s name plate has been removed

  • evidence that the aircraft’s 24-bit address code has been removed

  • any other document or report that CAAS may require

If an Export Certificate of Airworthiness is required, apply for a “Deregistration + Export Certificate of Airworthiness” application on eSOMS.

Phase 3: Document evaluation

CAAS will review the application and documents submitted. During this phase, CAAS may request clarifications from the applicant.

Phase 4: Demonstration and inspection

CAAS may request an aircraft inspection or documentary evidence to verify deregistration requirements are met.

Phase 5: Certification

Upon approval, CAAS will notify the applicant and the Certificate of Deregistration will be available in eSOMS. Each certificate includes a QR code for authenticity.

Application to deregister your aircraft

To apply, submit your application on eSOMS.

Apply on eSOMS

If eSOMS is unavailable:

Legislation, regulations and resources

Contact information 

Flight Standards Division 
Contact us using the Enquiries & Feedback Form.