While there were strict laws on what possessions Jewish people leaving the
country could take with them, the main problem was obtaining a visa for the
destination of choice. Germany and Austria were only too glad for Jews to
leave - as long as they left their money behind. USA and Britain required
a sponsor who would guarantee that they would not become a financial
liability to their new home, and only a citizen of the destination country
was acceptable - in the case of England, he also had to be British-born.
So there had to be a deposition of money, and also quotas were imposed.
Often it was a question of what persons of influence one knew - such as the
St Albans, UK.