A source from the MACC told theSun that the notice was in relation to the case.
The reason behind this prolonged and extensive search was because they had found a safe at the Taman Duta residence of Najib, and were drilling it in attempts to get it open!
He also questioned the timing of the search, which "denied the right" of Mr Najib's family and staff to properly conduct their religious obligations before the opening of fast on the first day of Ramadan. Mahathir had pledged to hold Najib accountable.
Police seized 284 boxes of designer handbags and dozens of bags filled with cash and jewellery on Friday from a luxury condominium in the city centre.
State news agency Bernama reported Friday that 72 bags of jewelry, cash in a variety of currencies, nearly 300 boxes of designer handbags, and other luxury goods were seized in a raid Wednesday night in the downtown Kuala Lumpur development Jalan Raja Chula.
Lawyer Harpal Singh Grewal said police arrived at about 10pm on Wednesday at Najib's house, and were still searching it on Thursday afternoon.
Najib and Rosmah have been blacklisted by the Immigration Department, and can not leave the country.
Five properties linked to Mr Najib, including the family home where he lives, were raided by police in their investigations into a multi-billion-dollar scandal at state fund 1Malaysia Development Berhad (1MDB), which was founded by Najib.
The current PM Mahathir has said there is sufficient evidence to investigate the scandal at 1MDB. His lawyer on Thursday denounced the long search of Najib's home as "harassment".
"We did not go for any other goal other than to serve him the notice to come to our office", said the source.
The U.S. Justice Department said previous year in a filing in a civil lawsuit that almost $30 million of funds stolen from 1MDB was used to buy jewellery for Rosmah, including a rare 22-carat pink diamond set in a necklace.
Singh said police have carried out raids on six premises, which include the prime minister's office and the prime minister's official residence in Putrajaya and four private residences linked to the former premier.