In a word, yes.
It is not a food safety issue. It is a quality issue. If pectin is past the expiration date on the package, the product made with this pectin will not gel or work as it should. This is true for both liquid and dry pectin.
Dry pectin is made from citrus peel. Liquid pectin is made from apples. They are not interchangeable in recipes. For best results, use the type of pectin listed in the recipe.
www.rrc.k-state.edu/preservation/jam-jelly.html
The ripeness of fruit will affect the gelling properties. Under-ripe or over-ripe can affect how a jam or jelly gels.
