This is not necessary as the skins become so soft in the boiling that they seem to almost dissolve in the body of the jam. Apricot skins also contain a lot of pectin which aids in the setting of this jam so it’s really up to you whether you peel the apricots or not. I do not. Whether you boil fruit or not, it’s always good to get into the habit of washing fruit well before using the fruit in recipes.