SOLIDARY CO-DEBTOR vs SURETY
There is a difference between a solidary co-debtor, and a fiador in solidum (surety),
The latter, outside of the liability he assumes to pay the debt before the property of the principal debtor has been exhausted, retains all the other rights, actions and benefits which pertain to him by reason of the fianza (obligation/suretyship); while a solidary co-debtor has no other rights than those bestowed upon him in Section 4, Chapter 3, title I, Book IV of the Civil Code.
Carodan v. China Banking Corp., G.R. No. 210542, [February 24, 2016], 781 PHIL 750-770 citing Inciong, Jr. v. Court of Appeals, G.R. No. 96405, [June 26, 1996], 327 PHIL 364-374)
Section 4, Chapter 3, Title I, Book IV of the Civil Code states the law on joint and several obligations. Under Art. 1207 thereof, when there are two or more debtors in one and the same obligation, the presumption is that the obligation is joint so that each of the debtors is liable only for a proportionate part of the debt. There is a solidary liability only when the obligation expressly so states, when the law so provides or when the nature of the obligation so requires. 67 (Citations omitted)
Carodan v. China Banking Corp., G.R. No. 210542, [February 24, 2016], 781 PHIL 750-770