The process of returning migrants to their home countries is called deportation. Deportation occurs when a person is forcibly removed from their country of residence and returned to their country of origin. This can happen for a variety of reasons, including but not limited to: overstaying a visa, committing a crime, or being deemed a security threat. When someone is deported, they are typically given little notice and have few rights. They may be held in detention centers until they are deported or put on a plane back to their home countries. In some cases, people who are facing deportation may be able to appeal the decision or obtain a waiver that allows them to stay in their country of residence.