Instructions on how to file for a complaint, appeal, or dispute

If you wish to file for a complaint, appeal, or dispute related to our conformity assessment activities, please follow the instructions below:

1. Submit your complaint to a Certification Organization employee and, if possible, directly to the Quality Assurance Manager:
   By phone: +52 (55) 30 00 54 00;
   By fax: +52 (55) 30 00 54 91;
   By e-mail quejas@mx.ul.com;
   
   In person, at our facilities located at:
   Blas Pascal 205, Piso 2
   Col. Los Morales
   C.P. 11510
   México D.F.
2. If you're filing a complaint, please do so in writing and indicate your reasons and what you expect from a resolution. Appeals and disputes will only be considered if formally submitted with a description of the problem. In case of appeals, please include the name and position of the interested party, as well as any data that identifies the decision you are appealing and any arguments for your appeal. This letter must be signed by the interested party, legal representative, or authorized representative.
3. UL de México personnel or the Quality Assurance Manager will record your complain, appeal, or dispute on a F-005-01 form and address the issue.
4. Within ten (10) business days, you will receive a formal response on your complaint, appeal, or dispute.
5. In case of negative responses, that is, if your complain, appeal, or dispute has no grounds, we will indicate the corresponding reasons and motives for the denial and request that you submit a written acceptance.
6. If your complaint, appeal, or dispute has legal grounds, you will be formally notified in writing regarding the actions or activities that will be performed by UL de México in order to correct the problem and assure it will not take place again. In this case, your written acceptance will also be required.
7. If you agree with our response or additional information is required and your response is not received within ten (10) business days, UL de México will understand that the complaint, appeal, or dispute is formally closed.
8. Otherwise, in case of complaints, the process will be repeated. In case of appeals and disputes, you may request that the competent agency solve the issue according to the terms stated by Federal Law on Metrology and Standardization (LFMN - Ley Federal sobre Metrología y Normalización), Article 122.

You may visit our facilities to lean more about the corresponding procedures.