Answer:
call premium
Explanation:
The bonds has certain conditions and one of them is the right of the issuer to purchase the bonds therefore, extinguish the debt before the maturity expressed in the bond. As this is a change to the original terms usually the issuer is forbidden to do so in the first years of the bond or it can do it at given dates. In any case, the issuer pays a premium for this right to compensate the bondholders