Unfortunately, there is not much we can do to prevent leakage especially on blantons and vintage whiskies where possible leakage is always a risk. We do our best to make sure the cap is sealed well to prevent this. There are times when this happens, however the product has never been tampered with. We do not issue exchanges or refunds for minor leakage, but if you have an extreme case please let us know and we will see what we can do.