A website's registration form does not have a working autocomplete. Having no autocomplete functionality can slow down users with a disability and can even annoy users with no disabilities (e.g., password managers cannot reliably determine what each input represents).

Note: Most browsers attempt to understand what autocomplete attribute is correct for each input based on the label text. This technique does not work reliably in all languages. For example, an internationalized website will for sure have trouble. Weird label names will also make the autocomplete functionality stop working. Having the autocomplete attribute on all inputs should be considered mandatory!

Hint: When making changes to the HTML code, try to reload the preview page to see what autocomplete functionality your browser offers with each attribute!