At air and sea ports, the form is issued electronically and the officer also stamps the alien's passport. The I-94 can be retrieved at any time using an online retrieval tool. At land ports, only paper forms are issued for people who have not informed the CBP of their arrival in advance. However, in September 2016, CBP announced that land travelers who inform the CBP in advance and pay a $6 fee can get electronic Form I-94s issued at land ports of entry.