OK, so my husband brought a cake I did to work for someone who requested one of my cakes. This was a paid cake. DH said that when they opened the box, a piece of the back had come off......this was a two layer torted cake with 3 fillings. What happened? Would dowel rod supports helped? I feel bad that his first experience with a cake from me was not at least close to perfect. DH said that he even gave me a tip although I don't know if this was before or after they discovered the imperfection. ADVICE PLEASE? 
Do you mean a piece of the back as in a piece of cake or part of the icing? I have had icing borders fall of due to humidity and pieces of cake fall off when the box is not properly supported when carried. Was the cake sculpted in any way or just a standard sheet/round cake? Sorry I couldnt help anymore.
BellaRosa
What did you support the cake with??
Plain cardboard rounds are not very sturdy..if the round bent that could be why the piece fell off.
Was it a fresh cake out of the oven or did you freeze it first? Sometimes a fresh cake will do this, especially if the frosting is kind of heavy and also if it was cut for torting. You might try freezing it first and it will be easier to handle. Cut it for torting after freezing. It won't hurt the taste and will be even more moist but will hold together better.
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