<p>How do colleges know whether or not you sent in all scores?</p>
<p>Neither College Board (SAT) nor ACT provides anything to indicate you did not send a test score. Two ways a college may find out : (a) application for college specifically asks you to list all scores and you list them; (b) many high schools put all your scores on your official high school transcript sent to colleges.</p>
<p>I was referring to withholding scores;How do colleges that require all scores know whether or not you withheld?</p>
<p>That is what drusba was referring to as well.</p>