There are three common authentication methods: Certification, DoC, and Verification,the stictness dicreases.
For these three certifications, the FCC committee also has relevant requirements for each laboratory.
FCC certification:
Verification : There must be the FCC mark on the product, package, or the description:
FCC claim identification: This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
(1) this device may not cause harmful interference (2) this device must accept any interference received, including interference that may cause undesired operation.