An email from Boston College alerts me that something called an 'unresolved balance' could impede my registration for the spring semester.
"[The students] contract debts and sometimes withdraw from the university without paying them, on which account they are excommunicated and do not care..."
(Alvarus Pelagius (ca. 1275-1349), De Planctu Ecclesiae, quoted from Brian Tierney, ed. Sources of Medieval History, 4th ed. (New York: McGraw-Hill, 1983), 297.)