There are many possible solutions to solve this problem. All solution almost same but one of them can work for you. Let me know what work for you.

Solution 1:

<input type="text" autocomplete="off" />

Solution 2:

<input name="pass" type="password" autocomplete="new-password" />

Solution 3:

When you always render autocomplete with random string, it will never remember anything.

<input name="name" type="text" autocomplete="rutjfkde">

Solution 4:

<form action='' autocomplete='off'>

Solution 5:

<input type="text" name="UserName" autocomplete="off" readonly 
    onfocus="this.removeAttribute('readonly');" >

Solution 6:

Instead of autocomplete="off" just simply use autocomplete="false"

Solution 6:

<input type="text" name="field" autocomplete="nope">

Solution 7:

Change the input type attribute to type="search". Google doesn’t apply auto-fill to inputs with a type of search.

<input type='search' name="whatever" />

Solution 8:

<input autocomplete="off" aria-invalid="false" aria-haspopup="false" spellcheck="false" />

Use all attributes

Source: Stackoverflow