There are two types of equipment authorization procedures for FCC marking in United States: CERTIFICATION (47 CFR Section 2.907) and SUPPLIER’S DECLARATION OF CONFORMITY (47 CFR Section 2.906).
1. CERTIFICATION (47 CFR Section 2.907)
Certification is the approval process for Radio Frequency (RF) Devices with the highest potential to cause interference to radio services. Certification is an equipment authorization issued by an FCC recognized TCB (Telecommunication Certification Body) based on an evaluation of the test data submitted by the the manufacturer or importer. Testing is performed by an FCC-recognized accredited testing laboratory. Information for all certified equipment is posted on a FCC-maintained website. In addition, equipment subject to approval using the Supplier’s Declaration of Conformity (SDoC) procedure can optionally use the Certification procedure.

2. SUPPLIER’S DECLARATION OF CONFORMITY (47 CFR Section 2.906)
Supplier’s Declaration of Conformity (SDoC) is a procedure that requires the manufacturer or importer responsible for compliance ensure that the equipment complies with the appropriate technical standards. The manufacturer or importer must be located in the United States but it is not required to file an equipment authorization application with the FCC or a TCB mentioned above for certification. The manufacturer or importer must provide a test report and other information demonstrating compliance with the rules upon request by the FCC. Equipment authorized under the SDoC procedure is not listed on a FCC website. In addition to SDoC, using the certification procedure is optional.

Devices authorized under the SDoC procedure have the option to use the FCC logo to indicate compliance with the FCC rules and the logo may be included in the instruction materials or as part of an e-label.

The FCC logo shall only be used on a product that has been tested, evaluated, and found to be compliant in accordance with the SDoC procedures. The use of the FCC logo on the device does not mitigate the
requirement to provide a means to uniquely identify the product or to provide the required compliance information statement.
For certification, the product shall bear a nameplate or label with the FCC Identifier (FCC ID), as defined in Section 2.925.13. The FCC ID must always be accessible when using the product. The placement of the FCC ID must be a physical label on the product, unless an e-label is used.
What guidance is available for labeling and user information for RF devices?
There are two guidelines published by FCC for labeling. Click here to reach them.
Do you need FCC testing, certification, SDoC or consultancy services?