When your certificate has or is due to expire you can recertify by completing a recertification/refresher course.

I&M (3361) – recertified by SP3361R

D&E (3321) – SP3321R

All other courses are refreshed by retaking the same course as they do not have separate recertification courses (they are updated regularly with new content)

If you take your recertification course before your original has expired, your new certificate will be dated from the completion date of the recertification course.