The foreigners division of the Home Ministry has served notices to NGOs on October 16, 2014 for not filing their returns for 2009-10, 2010-11 and 2011-12 under the Foreign Contribution (Regulation) Act and given time to reply within 30 days.
As many as 510 notices have been returned by the postal authorities undelivered due to various reasons, including shifting of the address.
There is no reply from the remaining 632 NGOs.
Early this month, government has said that 69 NGOs have been blacklisted from receiving foreign funds after finding faults in different aspects.
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Among those NGOs which were prohibited from receiving the foreign funds include 14 from Andhra Pradesh, 12 from Tamil Nadu, five each from Gujarat and Odisha, four each from Uttar Pradesh, Jammu and Kashmir and Kerala and three from Delhi.
On February 25, government told Parliament that more than 31,000 NGOs were served notices for not filing annual returns on their foreign contribution.
In 2011-12, notices were sent to 21,493 associations which were found to have not submitted annual returns under Foreign Contribution (Regulation) Act 2010 for 2006-07, 2007-08 and 2008-09.
In 2014, notices were issued to 10,343 associations which had not filed annual returns for 2009-10 to 2011-12.