The UK has recently adopted a policy of granting digital-only proof of immigration status for certain groups of migrants. More than 4.5 million individuals are reliant on this form of status and the number is growing. In this paper, we argue that this policy, as currently operationalised, is unlawful as a result of its discriminatory impact. If it remains unchanged, the roots of digital discrimination in immigration policy and administration will be allowed to spread, with potentially disastrous consequences.