Attaching certifications Use this procedure to upload certifications in your Supplier Portal account. Select My Account > My Certifications tab. Click Create. Specify this information: Certification Code Select a certification code. Commodity Code Optionally, specify a commodity code.Note: This field is only displayed if commodity code certifications are defined in supplier group. Effective Date Select the date for which the certification is in effect. Expiration Date Select the expiration date of the certification. Attachment Select the certification document or file to attach. Click Save.