Qualified appraisal institutions are reliable. Generally, formal appraisal institutions need three certifications recognized by the state, that is, any one of CMA, CAL and cncal must be printed on the inspection certificate. This is a criterion for judging whether the appraisal certificate is qualified or not.
These three signs correspond to:
1, CMA consists of national or provincial metrological certification and accreditation institutions and accredited metrological certification units.
2. National accredited testing institutions.
3.CNACL has passed the testing organization approved by China Laboratory.