In May 2012 the Mexican and Canadian NCPs received a request for review from an NGO on behalf of several trade unions, a common land owners unit ("Ejido"), and other interested parties, alleging that a mining multinational enterprise had breached the disclosure, human rights, employment and industrial relations, environment, and combating bribery, bribe solicitation and extortion provisions of the Guidelines in Mexico.

The Mexican NCP took the lead on the initial assessment with the support of the Canadian NCP. On 28 November 2012 the NCP concluded that it could not offer its good offices for the following reasons:

1. various parallel legal procedures existed which were highly relevant for the development and eventual outcome of the dispute;
2. the issues brought before the NCP were of a general nature and unsufficiently substantiated;
3. the mining company firmly rejected any possibility of a mediation process;
4. due to their nature, most of the allegations could not be resolved via mediation, and a solution would have to be provided from the appropriate authorities; and
5. parallel negotiation efforts at high political levels were taking place, and the participation of the NCP was not deemed as feasible or meaningful.