Edward Cohen’s son David, a 38-year-old teacher, was cleared of money laundering charges and supplying false information to the Charity Commission.
But he was convicted of providing false information for the purposes of obtaining benefits.
David Cohen, of Ashbourne Avenue, in Temple Fortune, North London, was granted bail.
Both men will be sentenced on July 4.
The trial partly concerns the financial activity of charity Chabad UK - which is entirely separate from Chabad Lubavitch UK, and not part of the official Chabad movement.
Data obtained by police investigators show that in one financial year – 2012/13 – Chabad UK’s income jumped from £1.26 million to just under £8 million, almost £7 million of which came from merchant accounts linked to sales.
The following year, Chabad received £2.85 million from merchant accounts, out of a total income of £3.4 million.
It contrasted with the period from 2008 until 2012, when merchant account proceeds accounted for 2.5 per cent of an income of £6.05 million.
The jury heard that Chabad UK’s premises, on Oldhill Street in Stamford Hill, North London, were raided by police officers on September 1, 2014.
As well as seizing electronics owned by the defendants, prosecutor James Dawes QC said they found “thousands of pages” of documents allegedly linking the charity to the sale of medication to customers in Germany, Austria, the Netherlands, Italy, Sweden and Switzerland.
Included in the paperwork, Mr Dawes said, was evidence of “merchant accounts and correspondence in relation to foreign-exchange transfers”, as well as an application to establish a company in Hong Kong.
Edward Cohen, of Paget Road, Stamford Hill, in north London, was convicted of supplying false information to the Charity Commission and of becoming concerned in criminal property.
