The second-placed selection in Mexico's presidential selection, Andres Brother Lopez Obrador, has said he will install a lawful task to the outcome.
He said he would confirm that illegal cash was used to buy ballots and protected the success of centrist selection Enrique Pena Nieto, who declines this.
Mr Pena Nieto was verified the victorious one on Sunday after any recall, with 38.21% to Mr Lopez Obrador's 31.59%.
A demonstration april is organized in South america Town on Sunday.
Six decades ago, after dropping the presidential selection by a filter edge, the left-wing Mr Lopez Obrador led several weeks of demonstrations that triggered interruption in main places of South america Town.
Third-placed Josefina Vazquez Mota, from the right-wing Nationwide Activity Celebration, has confessed beat.
But the BBC's Will Allow in South america Town says it is not just Mr Lopez Obrador's group who are forcing for claimed problems to be examined.
There is a wide propagate of individuals, not actually from the remaining, who think ballots in their places of South america were interfered with, he contributes.
Accusations of problems led to a re-check of about 50% of ballots after the outcome was declared on Thursday.
The chief executive of Mexico's electoral system said on Sunday following the recall that there was no purpose not to take the outcome.
But Mr Lopez Obrador, of the Celebration of the Democratic Trend, said the selection had been bogus and that he would computer file an attraction next 7 days.
He accuses the party of Mr Pena Nieto, the PRI, of shelling out for ballots using present certificates for a grocery store cycle.
Numerous video clips have appeared of individuals declaring they obtained credit ratings in return for voting for the PRI.
Mr Lopez Obrador guaranteed to keep demonstrations relaxing and "act responsibly".
Mr Pena Nieto, of the PRI party, informed the BBC he had done nothing incorrect and said he may sue his oppositions over the accusations.
Our reporter says the selection had been a tortuous procedure, and that Mr Pena Nieto is unlikely to see a basic popularity of the outcome.
Mexico's Government Electoral Institution has until beginning Sept to deal with problems and officially declare a victorious one in the presidential selection.
