[PAULUS libro tertio decimo ad edictum. ] §4.8.26.prne in potestate sit fideiussorum postea se non obligantium, ut poena committatur.
[PAULUS in his thirteenth book on the Edict.] so that it may not be in the power of the guarantors, by subsequently refusing to bind themselves, to cause the penalty to be incurred.
idemque et si decesserint.
And the same applies even if they have died.