The shelf life of schnapps is indefinite, but if schnapps develops an off odor, flavor or appearance, it should be discarded for quality purposes.

Does peach schnapps need to be refrigerated after opening?

To maximize the shelf life of peach liqueur for quality purposes, store in a cool dry area away from direct heat or sunlight; keep tightly closed when not in use. ... The shelf life of peach liqueur is indefinite, but if peach liqueur develops an off odor, flavor or appearance, it should be discarded for quality purposes.

Does schnapps need to be refrigerated after opening?

"You can put schnapps and other similar alcoholic drinks in the fridge. This allows you to serve them neat, which means take it right from the bottle into the glass — you don't mix it with anything," said Caporale. ... If you want that to be served cold, then the only way to do that is to store it in the fridge."