Analysis of information sources in references of the Wikipedia article "Otto Frank" in French language version.
« In order to reach a neutral country, Frank then tried to obtain a Cuban visa, a risky, expensive and often corrupt process. In a Sept. 8 letter to Straus, he wrote, “I know that it will be impossible for us all to leave even if most of the money is refundable, but Edith urges me to leave alone or with the children.” On Oct. 12, 1941, he wrote, “It is all much more difficult as one can imagine and is getting more complicated every day.” Because of the uncertainty, he decided first to try for a single visa for himself. It is granted and forwarded to Otto Frank on Dec. 1. No one knows if it ever arrived; 10 days later, Germany and Italy declared war on the United States, and Havana cancelled the visa. »
