When millions of Iranian children flock back to school in September, thousands of Afghan schoolchildren living in the Islamic republic will remain at home.

Afghan refugees must produce residency papers and pay tuition to enroll in state schools in Iran, where up to 2 million undocumented Afghans live in legal limbo, according to the United Nations refugee agency, the UNHCR.

But a new online campaign is urging Iran's government to change such long-running practices toward Afghan nationals, many of whom are denied basic services, including access to health care, jobs, and even housing in Iran.

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