<p>my sister's taking the SAT in the morning and doesn't know her social security number...
I can't remember from when I took it whether or not she'll really need it.
is it absolutely necessary?</p>
<p>no i dont believe it is</p>
<p>Its optional</p>
<p>What's the purpose of it anyways?
Is it better to put it?</p>
<p>Don't put it. Identity theft sucks. Why give a private company that important piece of information about you?</p>