- Fayulu said the DRC's Independent National Election Commission (CENI) had "quite simply fabricated the results it published".
- He suggested setting up an AU special committee to verify the results.
The runner-up in DR Congo's controversial presidential election has proposed staging the poll again within six months.
In a letter to the African Union summit in Addis Ababa, Martin Fayulu restated his allegation that the vote result had been rigged, and suggested "holding the elections again within six months".
Felix Tshisekedi was declared winner of the December 30 ballot with 38.5 percent of the vote, against Mr Fayulu's 34.8 percent.
Mr Fayulu, whose letter was made public on Monday, said the DRC's Independent National Election Commission (CENI) had "quite simply fabricated the results it published".
He pointed to reports from independent election monitors and observers from his own coalition, Lamuka, as well as to vote tallies by the CENI itself that have been leaked to the press.
"(All) attest that I was elected president of the Democratic Republic of Congo with more than 60 percent of the vote," he charged.