ECHA carries out a technical completeness check on each incoming registration and PPORD notification as set out in Article 20(2) of the REACH Regulation. This is done to ensure that the dossiers include all the information that is required. The quality or adequacy of the provided data or justifications are not assessed as part of the completeness check.
Completeness checks are performed both on new registrations and updates of existing registrations. All the information in a dossier is checked, whether it is newly submitted or already part of the previous submission. The completeness check can only be successful if all the information in the dossier is complete.
As a registrant, you can use the IUCLID Validation assistant to simulate the completeness check on your IUCLID dossiers before submitting them to ECHA. The Validation assistant can only predict the outcome of the computer-based part of the completeness check.
Since 2016, completeness checks also include manual verification which means that ECHA checks certain elements of the registration dossier that cannot be checked automatically. The outcome of the manual verification cannot be predicted with the IUCLID Validation assistant. PPORD notifications are not manually checked.
Failures and rejections
If your first submission fails the technical completeness check, you will get four months to correct the information. If your second submission is also incomplete, or you fail to resubmit by the four-month deadline, your submission will be rejected and the data will not be included in ECHA’s databases.
- 21 February 2023
ECHA will implement new and updated technical completeness checks as of 1 June 2023. Watch our webinar to learn more about the changes
- 12 April 2022
Upcoming changes in to REACH information requirements:
The European Commission has revised certain information requirements for registering chemicals under REACH. Companies should start to prepare as the changes will begin to apply in October 2022. ECHA will publish further advice later this year.
- 27 October 2021
IUCLID 6.6 October 2021 release:
New set of completeness check rules for sections 3.5.1 – 3.5.6 checking if an invalid environmental release category (ERC) is provided in the ‘contributing activity / technique for the environment’ block [EN][PDF]
- Webinar "Completeness check of REACH registration dossiers: what changes in 2023 and how you can prepare"
- Manual on ‘How to prepare registration and PPORD dossiers’ [EN][PDF]
- Guidance on registration [EN][PDF]
- Information on manual verification at completeness check [EN][PDF]
- Q&A on REACH
- Webinar: revised completeness check
- Webinar: completeness checks on chemical safety reports: practical advice
- Tutorial: How to run the Validation assistant
- Tutorial: How to opt-out under REACH
- Tutorial: How to report read-across – Category Approach
- Tutorial: How to report read-across – Analogue Approach
If you have questions related to technical completeness check, use ECHA’s contact form:
- Select ‘Technical support’
- I need support with ‘REACH-IT’
- Request type ‘Completeness check’
For questions related to the Validation assistant, see further instruction at: