This has been found to be inherently true by most immigration practitioners:
“Often, migrants do not receive copies of deportation documents and have little understanding of the processes they have undergone and the related legal ramifications. When U.S. officials prevent migrants from accessing critical information and processes, they further deprive individuals of their possible legal opportunities to present immigration claims.
“Given the escalation of immigration enforcement, the problems identified in this report are only likely to multiply. If not addressed, the behavioral patterns leading to abuses could spawn mass constitutional rights violations.”
Source: Deportations in the Dark