In his memoirs, published in 1969 he maintained that his plans were to give Jews hope for survival and that he had assumed that the liberation of the Netherlands would take place before his customers were deported.

The debate about his guilt or innocence—called the “Weinreb affair”—was very heated in the Netherlands in the 1970s, involving noted writers like Renate Rubinstein and Willem Frederik Hermans.

In an attempt to end this debate, the government asked the Rijksinstituut voor Oorlogsdocumentatie (Netherlands Institute for War Documentation) to investigate the matter.

In 1976 the institute issued a report (a part of which had already been leaked to the press in 1973), which determined that his memoirs were "a collection of lies and fantasies,"[2] and that his collaboration had caused 70 deaths.

In a Dutch biography by Regina Grüter published in 1997, Een fantast schrijft geschiedenis, Weinreb was depicted as a sufferer from Pseudologia fantastica.