The Witney- and London-based company appointed KPMG yesterday afternoon (2 December), after informing staff last week that the company was not able to pay their wages.
Unite national officer Tony Newbury said: "This is a sad and sorry affair. Staff were told last week that the company was not in a position to pay wages for November and they are now in limbo. It leaves a bad taste in the mouth."
Employees have also been in contact with PrintWeek to confirm that November's wages have not been paid.
A statement from KPMG has now confirmed that partners Mark Orton and Jane Moriarty have been appointed joint administrators.
Orton said: "It is unfortunate that Alden Hendi has become a victim of the current economic climate. It is a particularly difficult time in the printing sector."
According to sources within the company, additional support from the bank, which was expected around a month ago, never emerged.
A total of 160 jobs are at risk across the two sites – 40 in London and 120 in Witney.
It is understood that directors tried to find a buyer for the Witney plant, which was opened by David Cameron in 2006.
Hendi Group only acquired the Alden Group, a 175-year old company, in June of this year.
Alden Hendi chief executive John Pulford was unavailable for comment.
UPDATE: Staff left unpaid as Alden Hendi administration confirmed
Commercial and book printer Alden Hendi Group has been placed in administration, leaving its 160 staff unpaid and "in limbo".