*349 Mr. Justice Harlan

delivered the opinion of the court.

There is no dispute as to the facts out of which the present controversy has arisen. Substantially the facts are these: On the sixteenth day of April, 1907, the appellee Downie was appointed receiver of the property of Gam-well & Wheeler, partners, who had previously, on the same day, been adjudged bankrupts. Subsequently he was elected and qualified as permanent trustee, and by order of the court, June 20th, 1907, was authorized to collect all moneys due the bankrupts from the United States or any of its departments.

Gamwell & Wheeler, as a firm, held sixteen , unallowed claims against the United States, aggregating $33,517.48, the first one being dated December 10th, 1906, and the last February 15th, 1907. The National Bank of Commerce..of Seattle was a creditor of that firm in the sum of $37,149.85. These claims were all assigned by' Gamwell & Wheeler to the above bank. The Seattle National Bank was likewise a creditor of the firm and to the extent of $22,582.19, with interest, and that firm held certain un-allowed claims against the United States, sixty-one in number, and amounting to $38,509.32- The first of the latter claims was dated. September 25th, 1906, and the last April 4th, 1907. They were all assigned by Gamwell & Wheeler to the last-named bank.

The parties, by stipulation of July 10th, 1907, agreed:

“That each and all of said claims against the United States Government, so assigned, [to the banks named] were claims for money due from the Government of the United States to the said bankrupt upon account of contracts entered into between said bankrupts and the United States for the furnishing of materials by said bankrupts to various departments of said Government; that said assignments were each and all. voluntarily made in consideration of a loan made by said bank to said bankrupts *350 at the time of said assignments and as collateral security for the repayment of said loans, and without notice to the other creditors of said bankrupts. That all of such assignments were made after the entering into of' said contracts and after partial performance thereof by said bankrupts before the allowance of any such claims or the ascertainment of the amount due thereon, or the issuing of any warrant for the payment thereof, and that none of said assignments were executed in the presence of any witnesses at all, and that none of them recite any warrant for the payment of the claim assigned, and that none of them were acknowledged by any officer having authority to take acknowledgment of deeds, or any other acknowledging officer at all, and that none of them were certified as being acknowledged by any officer. The said loans to wit of said banks exceeded in amount the value of said collaterals so assigned to secure the same, and there is now due to each of said banks on account of said loans an amount much in excess of - the value of the salid collaterals so assigned to each of said banks respectively.”

The claims of the two banks ($37,149.85 and $22,582.19 with interest) were allowed by the Referee in Bankruptcy, and it was adjudged by the court that the banks were entitled, respectively, to receive, on account of the claims assigned to them, whatever amount' might be collected oil them from the Government, and the Trustee was ordered to pay over to the banks holding the assignments the collections as they were made thereon.

The District Court allowed the respective claims of the banks as general debts, but disallowed them as preferred. This order was affirmed in the Circuit Court of Appeals, that court rejecting the claim of each bank for a lien upon the fund assignéd. The case is here under a certificate by Justice Brewer, to the effect that the determination of the question involved in each case was *351 essential to an uniform construction of the Bankruptcy Act throughout the United States.

The questions raised by the parties make it necessary to determine the scope and effect of § 3477 of the Revised Statutes in its application to these cases. That section was brought forward from previous acts of Congress and is as follows: “All transfers and assignments made of.any claim upon the United States, or of any part or share thereof, or interest therein, whether absolute or conditional, and whatever may be the consideration therefor, and all powers of attorney, orders, or other authorities for receiving payment of any such claim, or of any part or share thereof, shall be absolutely null and void, unless they are freely made and executed in the presence of at least two attesting witnesses,, after the allowance of such a claim, the ascertainment of the -amount due, and the issuing of a warrant for the payment thereof. Such transfers, assignments, and' powers of attorney, must recite the warrant for payment, and must be acknowledged by the person making them,. before an officer having authority to take acknowledgments of deeds, and shall be certified by the officer; and it must appear by the certificate that the officer, at the time of the acknowledgment, read and fully explained the transfer, assignment, or warrant of attorney to the person acknowledging the same.”

The words of that section a,re so clear and explicit that there cannot be, we think, any reasonable ground to doubt the purpose of this legislation. Its essential features are not new, as can' be seen by an examination of the acft of Congress of July 29th, 1846, “in relation to the payment of Claims” on the United States, and the act of February 26th, 1853, “to prevent, frauds upon the Treasury of the United States.” 9 Stat. 41, c. 66; 10 Stat. 170, c. 81. Turning to § 3477, we find Congress had in mind not only all transfers and assignments of any claim on the United States or part of a claim or any interest therein, whether *352 the transfer or assignment be absolute or unconditional and whatever was the consideration of the transfer or assign -ment, but all powers of attorney, orders or other authorities for receiving payment of any such claim, or of any part or share thereof. All such transfers, assignments, powers of attorney, order or authorities are declared to be “absolutely null and void,” except there be a compliance with the conditions fully set out in the statute. None of those conditions was complied with in these cases.

In United States v. Gillis, 95 U. S. 407, 416, it appears t hat suit was brought in the Court of Claims, by the as-signee of an unallowed claim on the United States, and the question arose whether the assignee could maintain a suit in his name for the proceeds of the claim. The Court of Claims sustained the assignee’s right to sue, but this court, upon careful examination of the act of 1853, reenacted in § 3477 of the Revised Statutes, reversed the judgment and directed the petition of the assignee to be dismissed. It was contended in that case that the act of 1853 had reference only to claims asserted before the Treasury Department. But that view was rejected. After observing that the comprehensive provisions of the statute excluded any exceptions to the rule presented, the court said: “We think, therefore, the act of 1853 is of universal application, and covers all claims against the United States in every tribunal in which they may be asserted. And such, we think, was the understanding-of Congress when the Revised Statutes were enacted. In the revision, the act of 1853 was included and reenacted.”

Among the earlier cases on the general subject is Spofford v. Kirk, 97 U. S. 484, 488-489, 490, frequently referred to in later decisions and always followed.

That was a case of a suit by Spofford, in the Supreme Court of this District. He became the holder, by assign- *353 inent, of certain acceptances which, upon their face, provided for payment to be made out of any moneys received from the United States on the claim of one Kirk against the Government. The assignee or holder of the acceptances paid value for thenx apd/acted in entire good faith. The question was whether an assignment of a claim against the United States, made before the claim had been allowed and before a warrant had been issued for its payment, had any validity, either in law or in equity. The court of original jurisdiction dismissed Spofford’s bill, and the judgment was affirmed here. Mr. Justice Strong, speaking for this court, referred to § 3477 of the Revised Statutes, and, among other things, said: “It would seem to be impossible to use language more comprehensive than this. It embraces alike legal and equitable assignments. It includes powers of attorney, orders, or other authorities for receiving payment of any such claim, or any part or share thereof. It strikes at every derivative interest, in whatever form acquired, and incapacitates every claimant upon the Government from creating an interest in the claim in any other than himself." After referring to the fact that the court had not been called upon to decide in the Gillis case, whether the assignment there involved was-invalid as between, the assignor and the assignee, the opinion proceeds: “But if after the claim in this case was allowed, and a warrant for its payment was issued in the claimant’s name, as it must have been, he had gone to the treasury for his money, it is clear that no assignment he might have made, or order he might have given, before the allowance would have stood in the way of his receiving the whole sum allowed. The United States must have treated as a nullity any rights to the claim asserted by others. . It is hard to see how a transfer of a debt can be of no force as between the transferee and the debtor, and yet effective as between.the creditor and his assignee to transmit an ownership of the debt, or create- a lien upon it. Yet if *354 that might be — and we do not propose now to affirm or deny it — the question remains, whether the act of Congress was not intended to render all claims against the government, inalienable alike in law and in equity, for every purpose, and between all parties. The intention of Congress must be discovered in the act itself. . . : . We cannot say, when the statute declares all transfers and assignments of the whole of a claim, or any part or interest therein, and all orders, powers of attorney, or other authority for receiving payment of the claim-, or any part thereof, shall be absolutely null and void, that they are only partially null and void, that they are valid and effective as between the parties thereto, and only invalid when set up against the government. It follows that, in our opinion, the accepted orders under which the appellant claims gave him no interest in. the claim of the drawer -against the United States, and no lien upon the fund arisihg out of the claim. His bill was, therefore, rightly dismissed.”

In St. Paul & Duluth R. R. Co. v. United States, 112 U. S. 733, 736, the court held that a voluntary transfer by mortgage, for the security of a. debt, and finally completed and made absolute by a judicial sale, was within the prohibition of § 3477, Mr. Justice Matthews, speaking for the court, saying that “if the statute does not apply to such cases, it would be difficult to draw a line of exclusion which leaves.any place for the operation of the prohibition.”

The latest adjudication, by this court, construing § 3477 of the Revised Statutes, is that of Nutt v. Knut, 200 U. S. 12, 13, 14, 20. That case involved, among other things, the validity of the clause in a written contract relating to compensation to be made to an attorney employed to prosecute n claim against the United States. The contract provided that the payment of such compensation “is hereby made a lien upon said claim and upon any *355 draft, money or evidence, of indebtedness which may bo issued thereon. This agreement, not to be affected by any services performed by the claimant^ or by any other agents or attorneys employed by him.” After referring to the words of § 3477 and citing previous cases in which the scope and meaning of that section were considered (which cases are given in the margin 1 ), this court said: “If regard be had to the words as well as to the meaning of .the statute, as declared in' former cases, it would seem clear that the contract in question was, in some important particulars, null and void upon its face. We have in mind, that clause making the payment of the attorney’s com-pénsation a Ken upon the claim asserted against the. Government and upon any draft, money or evidence of indebtedness issued thereon. In giving that lien from the outset, before the allowance of the claim and before any service had been rendered by the attorney, the contract, in effect, gave him an interest or share in the claim itself and in any evidence of indebtedness issued by the Government on account of it.. In effect or by its operation it transferred or assigned to the attorney in advance of the allowance of the claim such an interest as would secure the payment of the fee stipulated to be paid. All this was contrary to the statute; for its obvious purpose, in part, was to forbid any one who was a stranger to the original transaction to come between the claimant and the Government, prior to-the allowance of a claim, and who, in asserting his own-interest or share in the claim, pending its examination, might embarrass the conduct of the business on the part of the officers of the Govern *356 ment. We aré of opinion that the state court erred in holding the contract, on its face, to be consistent with the statute.”

In this connection, it must be said that this court has held that the statute in question does not embrace the transfer of a claim against the' United States, where the transfer hab been by operation of law, not merely as the result of a voluntary assignment by the claimant. In Erwin v. United States, 97 U. S. 392, 397, this court, speaking by Mr. Justice Field, after referring to the act of 1853 embodied now in § 3477 of the Revised Statutes, to prevent frauds upon the Treasury, said that it “applies only to cases of voluntary , assignment of demands against the Government. It does not embrace cases where there has been a transfer of title by operation of law. The passing of claims to heirs, devisees, or assignees in bankruptcy are not within the evil at which the statute aimed; nor does the construction given by this court deny to such parties a standing in the Court of Claims.” This construction of the statute was recognized as settled law in Goodman v. Niblack, 102 U. S. 556, 560; St. Paul Railroad v. United States, 112 U. S. 733, 736; Butler v. Goreley, 146 U. S. 303, 311; Hager v. Swayne, 149 U. S. 242, 247, and Ball v. Halsell, 161 U. S. 72, 79.

The present cases are not assignments which by operation of law created an interest in the assignor’s claims against the United States. They are clean-cut cases of a voluntary transfer of claims against the United States, before their allowance, in direct opposition to the statute. If any regard whatever is to be had to the intention of Congress, as manifested by its words — too clear, we think, to need construction — we must hold such a transfer to be absolutely null and void, and as not in itself, passing to the appellants any interest, present or remote) legal or equitable, in the claims transferred. The result is that when Gamwell & Wheeler were adjudged bankrupts they *357 were still in law the owners of these claims on 'the United States, and all interest therein passed under the bankrupt act to their general creditors, to be disposed of as directed by the bankrupt act, just as if there had been no attempt to transfer them to the banks. Any other holding will effect a repeal of the statute by mere judicial construction in disregard of the plain, unequivocal intent of Congress as indicated by the statute.

The judgment as to each bank is

Affirmed.

Notes

Spofford, v. Kirk, 97 U. S. 484; United States v. Gillis, 95 U. S. 407; Erwin v. United States, 97 U. S. 392; Goodman v. Niblack, 102 U. S. 556; Ball v. Halsell, 161 U. S. 72; Freedmen’s Saving Co. v. Shepherd, 127 U. S. 494; Hobbs v. McLean, 117 U. S. 567; St. Paul & Duluth R. R. v. United States, 112 U. S. 733; Bailey v. United States, 109 U. S. 432; Price v. Forrest, 173 U. S. 410.