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Continuing to deliver on our assurance of ‘Compliance through Competence,’ TWI Certification Ltd is pleased to inform all CSWIP and BGAS-CSWIP certificate holders, as well as current and prospective employers, of our online verification service. This service is designed to provide a guarantee of authenticity for your certification, while also protecting the personal data of our 60,000 CSWIP certificate holders. 

In order to ensure authenticity, we recommend that employers verify the CSWIP or BGAS-CSWIP certificate, from any prospective employees. The certificate number and date of birth are listed on the certificate, while the customer/candidate number and picture is provided on the ID card once received.

For your own peace of mind, we strongly advise that employers use the verification service to confirm the validity of CSWIP and BGAS-CSWIP certificates, before employing anyone claiming to hold a CSWIP or BGAS-CSWIP certification. 

Those individuals who have been banned from holding a certificate issued by TWI Certification Ltd (TWI CL), including CSWIP, BGAS-CSWIP and the EWF/IIW Welding Coordinator Diploma, are listed here

If you experience any difficulties with the verification process, please do not hesitate to contact us at

Please note: It is not possible to provide verification through name or date of birth only, as this does not guarantee the level of authenticity/accuracy required and is considered a breach of a certificate holder’s privacy.

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