Orji Uzor Kalu, 56, was received by the Chief John Odigie-Oyegun-led National Working Commitee of the party at the National Secretariat on Wednesday.
He said he has succumbed to pressures from his friends and well wishers to contribute his quota to building the party in Nigeria especially in the South East.
Orji Uzor Kalu who is the chairman of SLOK Holding, also owns the Daily Sun and New Telegraph newspapers.
He served as the governor of Abia State from May 29, 1999, to May 29, 2007 as a member of the then ruling political party, the Peoples Democratic Party, PDP.
He dumped the PDP and formed the PPA along with others but has now moved to the current ruling party, APC.
It will be recalled that on 31 October, the Economic and Financial Crimes Commission (EFCC) charged Kalu of money laundering before a Federal High Court in Lagos.
Orji Kalu was charged alongside his company, Slok Nigeria Ltd., and his former Commissioner for Finance, Jones Ude, on 34 counts bordering on money laundering.
The accused pleaded not guilty to the charges.

After the plea, counsel to the accused, Mr Mike Ozekhome (SAN), urged the trial judge, Justice Mohammed Idris, to allow the accused to continue with an earlier bail condition.
Ozekhome informed the court that the accused had earlier been arraigned before Justice Nyako, Adamu Bello and Uweh, all of Abuja Federal High Courts before they were re-arraigned today.
The prosecutor, Mr Adeniyi Adebisi, did not oppose the submission of defence counsel.
Adebisi, however, added that EFCC was only interested in the justice of the case which included the trial of the accused persons.
Idris consequently, adjourned the case to Dec. 12 and 13 for trial and ordered that the accused continue with the subsisting bail terms.
In the charge, the accused were alleged to have committed the offence between August 2001 and October 2005.
Kalu was alleged to have utilized his company to retain in the account of a First Inland Bank, now FCMB, N200 million.
The sum is alleged to have formed part of funds illegally derived from the coffers of the Abia State Government.
In one of the counts, his company (Slok Nig Ltd) and one Emeka Abone, who is said to be at large, were also alleged to have retained in the company’s account N200 million, on behalf of the first accused.