<p>A standby test taker is someone who did not register for an SAT test but wants to take it anyway. Therefore, the person goes to the place the SAT is being held with extra fees and takes the test if someone else doesn’t show.</p>
<p>You can read more about it here:</p>
<p><a href=“College Board - SAT, AP, College Search and Admission Tools”>College Board - SAT, AP, College Search and Admission Tools;