Thankfully I listened when someone told me early on to save every scrap of paper.
I left Sill at the end of May 86, with all my clearance papers stashed away, including Housing (I was in the BOQ). From there to Benning for jump school, then to my duty station in Germany.
Fast forward to late 1988, and my S-1 (who was a ring-knocking jerk) presented me with a letter saying I hadn't cleared Housing at Sill, and I owed them money. (He was happy about it, too--he thought he had something on the lowly ROTC USAR guy.)
I looked at the letter, and they were demanding 65 cents for one face towel ("washcloth", in civilian) that they claimed I hadn't returned. As proof, they included a copy of my clearing inventory, which listed everything returned, and was stamped "CLEARED", and signed.
I dug out my own identical copy of the clearing form, copied everything, and replied.
They wrote again, and this time I had to brief my cav squadron commander about the whole mess. He replied this time, and I never heard from Sill again.