Summary judgment was entered for the plaintiffs in this suit by the Trustees for the Welfare and Retirement Fund of 1950 (United Mine Workers of America) against a mine operator for “royalty” payments at the rate of forty cents per ton of coal mined by the defendant.1 We think the summary judgment was inappropriate in the light of the factual issues tendered.
From May 1955 to August 1958 the defendant was engaged in a strip mining operation in Harlan County, Kentucky. He employed three or four men at a time *198in the operation, and 'during the entire period seven different individuals were employed by him in the work.
The defendant claims that shortly after the operation commenced, a representative of the United Mine Workers, Floyd, came to the job and demanded that he sign the National Bituminous Coal Wage Agreement of 1952 with its amendments. At that time, the defendant had only three employees, only one of whom, he claims, was a member of the U.M.W. Nevertheless, the defendant signed the agreement and later signed the subsequent agreements of 1955 and 1956. Though he admits that Floyd made no threats of any kind to him, he claims that he was duressed into signing these agreements because of his conviction, based upon violence in Harlan County, Kentucky in previous years, that, if he did not do so, he and his employees would suffer injury to their persons or their property. Perhaps inconsistently, but more importantly, the defendant claims that before signing the first agreement he explained to Floyd that he could not pay a royalty of forty cents a ton or the union wage scale, and that Floyd prevailed upon him to sign the agreement as a mere formality, but with the clear understanding that he would not be bound by it. The defendant says that he operated on that basis during the three years preceding 1955, and that it was recognized by Floyd that the defendant could not afford the wages and royalty payments specified by the national agreement, and that he was not expected to pay them.
The defendant also says that in performance he did not pay the wages required by the national agreement, that questions affecting working conditions were settled on the scene, and that he sent monthly checks to the plaintiffs in amounts which he felt he could afford and without regard to the tonnage of coal mined, this being in accordance with his claimed understanding with Floyd. These monthly payments to the plaintiffs were in small, even amounts. Seven of them were for $120 each, two of them were for $140 each, three of them were for $200 each, three of them were for $100 each, and the remainder were for similar, even, moderate sums. The total of these payments aggregated $3,264, and the defendant suggests that neither the plaintiffs nor anyone else could have supposed that such even figures could have been based upon actual coal production. He points to his actual production figures which when computed for each month to a fraction of a ton in tenths and multiplied by forty cents a ton, would invariably produce an odd dollar amount for the royalty payment.
The plaintiffs claim that payments aggregating $52,795.40 should have been made to them and seek the recovery in this action, after crediting the defendant with the $3,264 he paid, of $49,531.40.
On summary judgment, the plaintiffs concede, as they must, that Floyd did and said everything that the defendant says he did and they accept the other fact asserted by the defendant.
The plaintiffs stand on the parol evidence rule and upon a theory that the policy of the National Labor Relations Act gives some added protection to labor agreements attacked as sham.
Before we give consideration to the legal issues tendered, we think the factual situation should be more fully developed. The defendant seeks to bring himself within the usual rule that an agreement which is purely pretensive and delivered with no intention that it is to be binding upon either party may be shown by parol evidence to have created no contractual obligations.2 It may be a salutary limitation upon the rule that the bare assertion of the party to be bound is not enough to show that the purported contract was a pretense and a *199sham,3 but here the defendant claims corroboration in the circumstances of his performance.
On the present record we think the facts are not sufficiently established to determine whether the situation is governed by the rule which denies enforcement of pretensive agreements or by the rule which forecloses the use of parol evidence to establish a contemporaneous oral agreement to vary the terms of a valid contract.
It is suggested, however, that a remand would be purposeless, and that the usual rule, which permits a party to show the real agreement, notwithstanding the existence of a pretensive writing, is inapplicable to collective bargaining agreements. The contention is founded principally upon that provision in the National Labor Relations Act4 which requires that a collective bargaining agreement be reduced to writing if requested by either party. We find, however, no such broad and collateral effect of the statutory provision.
The requirement that collective bargaining agreements be reduced to writing came into the Act after a history of refusal by some employers to make a memorial of agreements reached in collective bargaining negotiations. The Congress was of the opinion that a refusal to record an agreement reached was not the sort of good faith bargaining required by the Act. The requirement, however, is directed to real agreement of the parties. It does not make sacrosanct a pretensive agreement inconsistent with the real agreement reached in the collective bargaining process.
If negotiators in a collective bargaining session should arrive at a complete agreement on the eve of April Fool’s Day and, out of a perverted sense of humor, should reduce to writing, sign, and distribute a pretensive agreement far from the real agreement they had reached, surely either party could show that the pretensive agreement was in fact pretensive, and the right of each to require that the real agreement be reduced to writing would be preserved. The requirements of the Act are directed to the protection of the real agreement of the parties and not to alteration of accepted principles governing proof of the terms of the real agreement.
If, therefore, it should be made to appear that the union, for the sake of its relations with the larger mine operators, or for any other reason, insisted upon execution by the small operator of an agreement which in fact was pretensive and not the real agreement of the parties, nothing appears in the federal statutes which would prevent disclosure and proof of the real agreement between the union and the mine operator.
Finally, it is suggested that the plaintiffs, the Trustees of the Welfare and Retirement Fund, may have some greater right to enforce a pretensive agreement than would either of the immediate parties to it. The rights of the trustees, however, are entirely derivative. Their right to recover contributions from the mine operator is dependent entirely upon the real agreement between the operator and the union. The trustees have no independent right to insist that an operator make any contribution to the fund, or that it do so on the same basis and under the same formula that other operators contribute. The trustees are the third party beneficiaries of the real agreement between the union and operator, which they may enforce in accordance with its terms, but the fact that the suit is brought for the benefit of the third party beneficiaries would not foreclose a defense that there was no contract or that the writing upon which the complaint is based is not, in fact, the real agreement between the operator and the union.5
*200The judgment will be reversed and the case remanded for further proceedings.
Reversed and remanded.
. Lewis v. Lowry, D.C.W.D.Va., 190 F.Supp. 490.
. Lewis v. Mears, D.C.W.D.Pa., 189 F. Supp. 503, affirmed 3 Cir., 297 F.2d 101; and see Burke v. Dulaney, 153 U.S. 228, 14 S.Ct. 816, 38 L.Ed. 698; In re Hicks & Son, Inc., 2 Cir., 82 F.2d 277.
. Rock-Ola Manufacturing Corporation v. Wertz, 4 Cir., 282 F.2d 208.
. 29 U.S.C.A. § 158(d).
. One can imagine circumstances in which a pretensive agreement between the union and a mine operator might induce action by the Trustees or employees to *200their detriment. In such a situation an estoppel might arise or the union and the employer might be held responsible for the losses in a tort action. No such circumstances are developed on this record.