 The form and issuing authority would be more or less standardized, depending on the circumstances.An example is when in the early 1950s, the Iraqi government granted permission to its 120,000 Jewish citizens to leave (Operation Ezra and Nehemiah), conditional on their renouncing their citizenship and leaving behind all their properties and assets.The travel document that was issued was the laissez-passer, since an Iraqi passport was no longer possible.