Shema also handed the party another ultimatum within which to rescind its dissolution of the Katsina State executive committee.
The former governor told the party that its failure to consider his two appeals within 48 hours meant he had ceased to be a member of the party.
Shema had made the declarations in a petition he wrote to the PDP National Chairman, Dr. Iyorchia Ayu.
In the petition dated 24 March, 2023, and which he personally signed, the former governor also copied the National Legal Adviser of the party.
Copies of the petition which were made available to the media in Katsina on Friday afternoon showed that it was acknowledged and received at the PDP National headquarters, Abuja also on Friday,24, March,2023.
Shema told the party chairman in the petition that apart from the fact that his suspension from the party and the dissolution of the Katsina State executive committee were against the provisions of the constitution of the party, he had been a loyal party member for twenty four years, enduring all challenges.
The former governor declared in the petition, “I am a member of the National Executive Council, Board of Trustees( BOT) and caucus member of our party and know as of law and fact that the dissolution of a lawfully elected Katsina State executive committee cannot bear constitutional validity just as my suspension from the party.
“It is pertinent to state categorically here that chapter 10 of the PDP constitution (2017) as amended (Disciplinary Procedure), particularly section 56(6)(7) and section 59 (3), were not adhered to in reaching these decisions which clearly demonstrate contempt for democracy.
“It is in the light of these developments that I make the following appeals: Rescind the National Working Committee decision of unlawful dissolution of Katsina State duly elected executive committee and allow them to complete their tenure and disband the purported caretaker committee similar to which so many court decisions in the land have rendered illegal.
“Rescind the National Working Committee decision of my suspension as member of our party within the next fouty eight hours (48hrs).
“Take notice that failure to effect the two changes above within 48 hours, this letter serves as my formal and official withdrawal of my membership from the Peoples Democratic Party, effective from Saturday, 25, March,2023.”