ISO 27001 Certified ISMS Foundation (CISF) qualification

Answer:

The qualification you mention is accredited by IBITGQ (International Board for IT Governance Qualifications), whereas our ISO 27001 Foundations Course https://advisera.com/training/iso-27001-foundations-course/ is accredited by Exemplar Global https://exemplarglobal.org/ - I'm not sure if these two accreditation bodies have the same criteria, but since Exemplar Global is one of the two largest accreditation organizations worldwide, this means they have quite strict requirements.

Given the response above, can we also use the CISF suffix after our names?

For information about the use of CISF credential you need to contact IBITGQ (International Board for IT Governance Qualifications).