Is it permitted to flush a toilet on Shabbos if a paper such as a receipt fell inside or is it Mochaik (erasing)? In need, can one use the left cover of the roll or other printed paper material as toilet paper? Does it matter which side one uses? Is there an issue of Mochaik when urinating on a solid bar deodorant placed on a urinal that has letters engraved on it?

Since one doing anything of the above has no intention of erasing anything written and besides it may not even happen, it is a case of a ‘Dovor Sheino Miskaven’ and not a ‘P’sik Reisha’ or a not intentional prohibited act that may not even happen and is therefore permitted.