As GADRIVR has noted, most flying schools will withhold documentation such as log books, but more importantly student progress sheets until all outstanding monies are owed. Its a bit like a mechanic not giving you the keys to your car until you have paid for the service. If there is a dispute between you and the school concerning monies owed you should get that sorted by negotiation or through ACAT. Once that is finalised the school would have no grounds to withhold your documents. Flying school skipping is very common when students either feel they are not getting a fair deal, are being overtrained and ripped off or as in some case just aren't cutting the mustard. Not sure what applies to you. Consumers have rights but so do merchants.