Unproctored (unsupervised) testing of people is suitable in some situations, for example assessing candidates for employment or students for grading purposes. This has occurred because there are some significant cost saving in unproctored testing when compared to proctored (supervised and typically onsite) testing. However the cost saving comes with some disadvantages.
In particular, the unproctored testing process is more open to abuse than proctored testing. For example, cheating is made easier by having someone else perform the test on the person's behalf. This is unfair to the remaining candidates or students and at the same time lessens the accuracy and therefore value of the tests for the organisation relying on the testing results.