Sending a letter of recommendation

So in the common app there is a section for other types of recommenders. If my recommender has sent his letter of recommendation by mail do I always have to add him to the common app??

“We understand that in very exceptional circumstances a recommender may not be able to use the online system (e.g., no access to the internet). Even so, you must still register the recommender in the online application”
Otherwise you might not have the recommendation considered in your app.

Ok thanks!!

Also** not always