Are there different levels of Kosher certification for wines?

Yes, kosher wines can have various standards of certification, ranging from the ones rigorously followed in production to those that are more lenient at certification stage. These may be from the most fundamental Kosher certification to a higher level of Mevushal (flash-pasteurized) and Passover-Kosher standards, which entails respectful of ingredients and equipment as well as of production method.