Moro's methods have been questioned by his peers and audited by Brazilian Justices since 2005.
In 2007, when a defendant wasn't to be found at home, he issued an order to monitor the lists of passengers of all airliners flying from Ciudad del Este in Paraguay and from Porto Alegre in Brazil to Curitiba in order to track the movements of the defendant's attorneys.
From 2007 through 2010, he issued an order to record and collect all phone communications and visitor booth talks between all inmates, their families and attorneys at Catanduvas Federal Penitentiary in order to "prevent future crimes".

These cases, among others, have been considered excesses and have brought grave criticism on Moro.
Justice Celso de Mello has officially accused Moro of condoning a "nosy police state" and acting as an "investigative judge".
Additionally, Brazilian Justice Gilmar Mendes said he was worried about Moro's actions.
For him, the case showed a "set of abusive acts" and "objectionable excesses" practiced by the judge.
In his dissenting opinion he wrote that they are "unacceptable behaviors in which resistance or nonconformity of the magistrate is envisaged, when contradicted by decision of superior instance".

On 6 December 2016, at a ceremony in which Moro was awarded a Man of the Year prize by Brazilian Editora Três publishing house, Moro was photographed laughing alongside Brazilian Senator Aécio Neves, PSDB's candidate in Brazil's 2014 Presidential Election and main critic of PT's tenures in office.
Since PT is the party most scrutinized by Operation Carwash, the photograph has caused an uproar among PT supporters.
During an interview, Moro has said that "the photograph was unfortunate, but there's no bias in my decisions as a judge", while also remarking that Neves is not under his jurisdiction.
 Neves was accused by five witnesses at Operation Carwash of taking R$300,000 in bribes from Alberto Youssef.

The speed with which Moro has treated specific actions that involve figures from the Brazilian left and his courteous relationship with members of the former opposition, some of which under investigation themselves, has been criticized by Brazilian jurists and left-wing activists and politicians, who accuse Moro of being part of a lawfare strategy in order to ostracize PT and bring PSDB to power.

During a lecture at Harvard University in 2017, Sérgio Moro stated that he considers the use of undeclared donations – a crime in Brazilian electoral law – to fund elections more damaging than illicit enrichment through corruption: "If I take this bribe and deposit the money in Switzerland, the money stays there, it isn’t harming anyone at the moment.
If, however, I use the money to fraud and win an election, I find that terrible."
On May, 2017, then-congressman Onyx Lorenzoni admitted to having used slush funds donated by JBS in his 2014 campaign for Congress.
Lorenzoni has been appointed Chief of Staff by president-elect Jair Bolsonaro; upon being questioned by the press about Lorenzoni’s public admission on the use of slush funds, Moro has stated that Lorenzoni has already apologized to him and has his "personal trust".
In November, 2018, Senator Roberto Requião (MDB) proposed a bill called "Lorenzoni Law", which would grant immediate pardon for anyone found guilty of electoral and public administration crimes or crimes against the national financial system, as long as they ask for forgiveness.
This proposal, although official, has been considered a joke on Moro’s statements.
Moro's methods have been questioned by his peers and audited by Brazilian Justices since 2005. In 2007, when a defendant wasn't to be found at home, he issued an order to monitor the lists of passengers of all airliners flying from Ciudad del Este in Paraguay and from Porto Alegre in Brazil to Curitiba in order to track the movements of the defendant's attorneys. From 2007 through 2010, he issued an order to record and collect all phone communications and visitor booth talks between all inmates, their families and attorneys at Catanduvas Federal Penitentiary in order to "prevent future crimes".
These cases, among others, have been considered excesses and have brought grave criticism on Moro. Justice Celso de Mello has officially accused Moro of condoning a "nosy police state" and acting as an "investigative judge". Additionally, Brazilian Justice Gilmar Mendes said he was worried about Moro's actions. For him, the case showed a "set of abusive acts" and "objectionable excesses" practiced by the judge. In his dissenting opinion he wrote that they are "unacceptable behaviors in which resistance or nonconformity of the magistrate is envisaged, when contradicted by decision of superior instance".
On 6 December 2016, at a ceremony in which Moro was awarded a Man of the Year prize by Brazilian Editora Três publishing house, Moro was photographed laughing alongside Brazilian Senator Aécio Neves, PSDB's candidate in Brazil's 2014 Presidential Election and main critic of PT's tenures in office. Since PT is the party most scrutinized by Operation Carwash, the photograph has caused an uproar among PT supporters. During an interview, Moro has said that "the photograph was unfortunate, but there's no bias in my decisions as a judge", while also remarking that Neves is not under his jurisdiction.  Neves was accused by five witnesses at Operation Carwash of taking R$300,000 in bribes from Alberto Youssef.
The speed with which Moro has treated specific actions that involve figures from the Brazilian left and his courteous relationship with members of the former opposition, some of which under investigation themselves, has been criticized by Brazilian jurists and left-wing activists and politicians, who accuse Moro of being part of a lawfare strategy in order to ostracize PT and bring PSDB to power.
During a lecture at Harvard University in 2017, Sérgio Moro stated that he considers the use of undeclared donations – a crime in Brazilian electoral law – to fund elections more damaging than illicit enrichment through corruption: "If I take this bribe and deposit the money in Switzerland, the money stays there, it isn’t harming anyone at the moment. If, however, I use the money to fraud and win an election, I find that terrible." On May, 2017, then-congressman Onyx Lorenzoni admitted to having used slush funds donated by JBS in his 2014 campaign for Congress. Lorenzoni has been appointed Chief of Staff by president-elect Jair Bolsonaro; upon being questioned by the press about Lorenzoni’s public admission on the use of slush funds, Moro has stated that Lorenzoni has already apologized to him and has his "personal trust". In November, 2018, Senator Roberto Requião (MDB) proposed a bill called "Lorenzoni Law", which would grant immediate pardon for anyone found guilty of electoral and public administration crimes or crimes against the national financial system, as long as they ask for forgiveness. This proposal, although official, has been considered a joke on Moro’s statements.
Sérgio Moro