after making the foregoing statement, delivered the opinion of the court.
This bond was givén in pursuance of the act of 1894, 28 Stat. 278, c.' 280, “for the protection of persons furnishing materials and labor for the construction of public works.” The act *423 requires, in substance, that persons contracting with-the TJnitéd States for the construction of any public building, etc., shall be required, before commencing such work, to execute the usual'penal bond, “with the additional obligations that such contractor or contractors shall promptly make payments to all persons supplying him or them with labor and materials in the prosecution of- the work provided for in such contract,” with a right on the part of the materialman to bring suit in the name of the United States for his use and benefit against the contractor and his sureties. The bond in this case contained two entirely distinct and separate obligations: First, that McIntyre should fulfill all the conditions and covenants of his contract, whatever changes in or additions to such contract might thereafter be made; and,, second, promptly make payment to all persons supplying him.labor and materials in the prosecution of the work. Of course, these covenants are to be read together and the latter interpreted in the light of the former.
The question involved is whether the ordinary rule that exonerates the guarantor, in case the time fixed for the performance of the contract by the principal be extended, applies to a bond of this kind executed by a Guaranty Company, not only for a faithful performance of the original contract, but for the payment of the debts of the principal obligor to third parties. It is conceded that, by the general law of suretyship, any change whatever in the contract for the performance -of which the guarantor is liable, made without his consent, such, for instance, as an extension of time for payment, if made upon sufficient .consideration, discharges the guarantor from liability.
Miller
v.
Stewart,
Counsel for the.Brick Company argued with much persuasiveness that this rule of
strictissimi juris,
though universally acceptéd as applicable to the undertaking of an ordinary guarantor, who is usually moved to lend his signature by motives of friendship or expectation of reciprocity, and without pecun
*424
iary consideration, has. no application to the Guaranty-Companies, recently created, which undertake, upon the payment of a stipulated compensation and as a strictly business enterprise, to indemnify- or insure the obligee in the bond against any failure of the obligor to perform his contract. It is, at least, open to doubt, however, whether any relaxation of the-rule should be permitted as'between the obligee and the guarantor, which may have signed the guaranty in reliance upon the rule of
strictissimi juris,
and with the understanding that it is entitled to the ordinary protection accorded to guarantors against changes in the contract or extensions of the time of payment. The' government wisely protects itself in these cases by providing in the bond that the obligation of the surety shall extend to all changes in or additions to the contract, which may thereafter be made — a clause which we have, held extends to such changes as might be found advantageous or necessary in the plans or specifications, but . does not extend to a change in the location of thé structure to be built.
United States
v.
Freel,
We do not, however,-deem it necessary to express an opinion upon this subject, as we prefer to rest our decision upon the perculiar character of the covenant upon which this action is-brought. In an. ordinary guaranty the guarantor understands perfectly the nature ánd extent of his obligation. If he becomes surety for the performance of a building contract, he' is presumed to know the parties, the terms of their undertaking, the extent and feasibility of the work to be done, the character .and responsibility of the.principal obligor,, and his ability to carry out the contract. If he. guarantees the payment of a particular debt, he usually knows the exact amount of the-debt, the time when it matures, and something -of. the ability of the principal to meet it. If he becomes responsible for the payment of the principal’s debts generally, or lends his credit *425 to a proposed purchaser of goods, he knows the amount of his liability and the means of his principal to meet them. In such cases he contracts in reliance upon the exact terms of his principal’s undertaking, and has a right to suppose that no change will be made without his consent; and the courts have gone so far as to hold that any change will exonerate him, though it really redound to his benefit.
This covenant, however, is inserted for an entirely different purpose from that of securing to the government the performance of the contract for the construction of the building. Inasmuch as neither the contractor nor his sub-contractors can secure themselves by a mechanic’s lien upon the proposed building, .the government, solely for the protection of the latter, requires a covenant for the prompt payment of their claims, and the same security that it requires for the performance of the principal contract. • In this covenant the surety guarantees nothing-to the principal obligee — the government — though' the latter permits an action upon the bond for the benefit of the sub-contractors. The covenant is made solely for their benefit. ■ The guarantor is ignorant of the parties with-whom his principal may contract, the amount, the nature, and, the value of the materials required, as well as the time when payment for them will become due. These particulars it would probably be im- . possible even for the principal to furnish, and it is to be assumed that the surety contracts with knowledge of.:this fact. Not knowing when or by whom these materials will be supplied' nr when the bills for them will mature, it can make no difference to him whether they were originally purchased on a credit of sixty days, or whether,' after the materials are furnished, the ■ time for payment is extended sixty days, and a note given for . the amount maturing at that time. If a person deliberately contracts', for an uncertain liability he ought not to complain when that, uncertainty becomes certain.
- Stress is. laid upon the fact that the defendant company . guaranteed that the principal obligor should “ promptly” make paymeht to his materialmen, and that -this, properly inter *426 preted, required that the contractor should pay at once upon the maturity of the bills, and that as such bills became due October 1, 1898, the promptness guaranteed required their immediate payment. We are not impressed with the force of this contention. If the word “promptly” has any particular significance in this connection, it is satisfied by such payment as the sub-contractor shall accept as having been promptly made; or perhaps it was intended to' give him an immediate action upon the bond, in case such payment be not made with sufficient promptness. It was not intended, however, that the want of an immediate payment should be set up as a de-fence by the surety. • As these bills are rarely paid the very day they become due, the narrow construction claimed would destroy the principal value of the-security.
The facts of this case do not call for an expression of opinion as to whether, if an unusual credit were given, and in the meantime the principal obligor had become insolvent, or the surety were otherwise damnified by the delay, it might not be exonerated; since neither of these contingencies supervened in this case, we are remitted to the naked proposition whether the giving of a customary credit, with no evidence of loss thereby occasioned, is sufficient to discharge the surety. We find no difficulty whatever in answering this question in the negative. The rule of stridissimi juris is a stringent one, and is liable at times to work a practical injustice. It is one which ought not ■tobe extended to .contracts not within the reason-of the rule, particularly when the bond is underwritten by a corporation, which has undertaken for a profit to insure the obligee against a failure of performance on the part of the principal obligor. Such a contract should be interpreted liberally in favor of the sub-contractor, with a view of furthering the beneficent object of the statute. Of course, this rule would hot extend to cases Of fraud or unfair dealing on the part of a sub-contractor, as was the case in United States v. American Bonding & Trust Co., 89 Fed. Rep. 921, 925, or to cases not otherwise within the scope of the undertaking.
*427 Bonds containing the covenant in question are not common, though they have sometimes appeared in the state courts, and the construction here given them has been generally adopted, ■ United States v. Hazzard, 53 N. Y. App. Div. 410, although these cases have generally turned upon the question whether the rights of the materialmen were affected by a change made in the contract by the principals. Dewey v. State, 91 Indiana, 173; Conn v. State, 125 Indiana, 514; Steffes v. Lemke, 40 Minnesota, 27; Doll v. Crume, 41 Nebraska, 655; Kaufmann v. Cooper, 46 Nebraska, 644; Griffith v. Rundle, 23 Washington, 453.
Both of the questions certified are answered in the negative.