Election Commission has ordered repoll at a booth in Chandni Chowk parliamentary constituency.
Official sources said the Chief Electoral Office of Delhi had submitted a report to the commission asking for a repoll in polling station number 32.
The presiding officer had forgotten to the test votes that were cast during mock poll before actual polling commenced at 7 AM on 12 May.
The repoll will be conducted on Sunday. The Chandni Chowk Lok Sabha seat had recorded 62.69 per cent turnout.