Some tasks undergo a review. The requestor can reject a task if it is done poorly (for instance, completed at random). Rejected tasks are not paid.
The review can take several days. To find out the exact period click the clockface icon in the list of tasks on the Toloka main page. The icon is absent if the tasks of this type are accepted without review.
The history of accepted and rejected tasks is available on the profile page (History tab). You can challenge the review results by writing a message to the requestor.
After the review the money for accepted tasks are transferred to your account. The amounts are displayed in the upper menu of Toloka (on the right):
green colour — your account balance in Toloka;
gray colour — the cost of the tasks under review.