AAP's National Secretary Pankaj Gupta said his party analysed booth-wise voting pattern and reached a conclusion that electronic voting machines were tampered with.
There is "clear and irrefutable evidence of manipulation of results at polling booths" in the Punjab Assembly polls, he alleged.
"In the interest of justice, transparency and fair play, the AAP has appealed to the EC that the results of all polling booths, where voter verification paper audit trail (VVPAT) had been deployed, be cross-verified/cross-checked with the paper trail so that the cloud looming over the use of EVMs is settled and the faith of the common man in the electoral process is restored," Mr Gupta said.
He said the initial analysis has shown that at several booths, where the AAP has secured a very less number of votes, voters in much bigger number than the total number of votes secured by the party have come forward, saying they had voted for the party.
"These people are ready to file affidavits to support their claim. These people are shocked that their votes have either not been counted as votes to AAP or have been transferred to other parties by EVM tampering," Mr Gupta said.
Delhi Chief Minister Arvind Kejriwal had on March 15 also alleged that manipulation of EVMs may have led to the AAP's poor showing in Punjab and said it could be part of a conspiracy to keep the party out of power in the state.
The AAP chief had then said his party would approach the poll panel in this regard.
Bahujan Samaj Party (BSP) chief Mayawati too alleged tampering of EVMs during the Uttar Pradesh Assembly elections.