[IDEM libro quadragensimo septimo ad Sabinum. ] §46.1.6.prStipulatus sum a reo nec accepi fideiussorem: postea uolo adicere fideiussorem: si adiecero, fideiussor obligatur.
[THE SAME in the forty-seventh book on Sabinus.] I stipulated from a principal debtor and did not accept a surety; afterwards I wish to add a surety: if I add one, the surety is bound.
§46.1.6.1Et parui refert, utrum pure fideiussorem obligem an ex die an sub condicione.
And it matters little whether I bind the surety unconditionally, or from a certain day, or under a condition.
§46.1.6.2Adhiberi autem fideiussor tam futurae quam praecedenti obligationi potest, dummodo sit aliqua uel naturalis futura obligatio.
Now a surety can be added to a future as well as to a preceding obligation, provided that there is some future obligation, even if it is only a natural one.