Midwеst Motor Express appeals from an order transferring this case fi'om the District of North Dakota to the Northern District of Illinois. We affirm the order of the district court. 1
I.
Midwest was obligated under its multiem-ployer collective bargaining agreement to make contributions to Central States, a pension fund. During a labor strike, Midwest ceased making pension contributions to Central States, creating concern at Central States that Midwest would withdraw and permanently cease making such contributions. If an employer withdraws from a multiemployer plan, the employer is liable to the plan fоr an amount known as “withdrawal liability.” 29 U.S.C. § 1381(a) (1985). The parties litigated the matter of withdrawal liability, but settled the litigation before it reached any conclusion on its merits.
Some time later, the union at Midwest was dеcertified. This triggered Central States’ belief once again that Midwest would withdraw and cease to make contributions. Central States sued Midwest in the Northern District of Illinois and sent Midwest a Notice and Demand of Withdrawal Liability as provided under the Multiemployer Pension Plan Amendments Act of 1980. In response to this notice, Midwest initiated the present action for declaratory and injunctive relief and moved to enjoin Central States from seeking remedies based on Midwest’s failure to pay withdrawal liability. (It seems that the proposed injunction was an attempt to prevent Central States from moving ahead in any other forum.) Central States then moved to transfer venue to the Northern District of Illinois under 28 U.S.C. § 1404(a). A magis *1016 trate judge 2 granted the motion to transfer and dismissed the motion for injunction and the district court uрheld the magistrate’s decision. The district court clerk’s office, without waiting a reasonable period of time to give the parties an opportunity to file a notice of appеal, immediately mailed the case file to the Northern District of Illinois. The Northern District of Illinois dismissed the case after transfer on the grounds that it had no jurisdiction while this appeal was lodged in the Eighth Cirсuit.
II.
We initially address some jurisdictional matters. First, although we generally do not exercise jurisdiction over transfer orders,
see, e.g., United States Fire Ins. Co. v. American Family Life Assurance Co.,
Second, Central States argues that this court does not have jurisdiction because the district court clerk mailed the сourt file to the Northern District of Illinois before the notice of appeal was filed. Our circuit takes the view that the physical receipt of the file in the transferee court is the event that signals the end of jurisdiction in the transfer- or court.
In re Nine Mile Limited,
We question the applicability of
Nine Mile
when the clerk’s physical transfer of the file was prematurе, mistaken, and was of no practical effect. The premature mailing in violation of
Nine Mile’s
directive renders the transfer of questionable legal effect.
Cf. Farrell v. Wyatt,
The premature physical transfer of the file in this case was a violation of our directive in Nine Mile; the Illinois court recognized the *1017 mistake and declined jurisdiction. These two facts separate оur ease from Nine Mile. To find under these circumstances that we do not have jurisdiction because the file was accidentally mailed to Illinois would elevate form over substance and serve only to delay the resolution of this appeal. We conclude that we have acquired jurisdiction.
III.
We affirm the district court and its decision to transfer this case based upon the “first-filed” rule. This rule “gives priority, for purposes of choosing among possible venues when parallel litigation has been instituted in separate courts, to the party who first establishes jurisdiction.”
Northwest Airlines, Inc. v. American Airlines, Inc.,
Midwest also argues that “compelling circumstances” should lead us to ignore the first-filed rule,
see United States Fire Ins. Co. v. Goodyear Tire & Rubber Co.,
Finally, the district judge suggested at thе end of his opinion that he was “reasonably certain” that Illinois courts had greater expertise in pension benefit matters. Midwest argues that this comment demonstrates that the district court madе its decision on improper grounds. The order, however, recited legally sufficient grounds for transfer. The comment has the quality of a mere observation or afterthought, and does not suggest to us thаt the district court abused its discretion in making its decision to transfer.
IV.
There remains an outstanding matter of contempt sanctions. Central States filed a motion for a preliminary injunction in the Illinois aсtion seeking to prevent Midwest from transferring assets and to compel Midwest to pay all past-due amounts under the withdrawal liability payment schedule as well as to make future payments under that schedule. Midwest responded by applying to the Eighth Circuit for an injunction pending appeal preventing Central States from “enforcing, collecting, accepting, claiming or directly or in escrow, obtaining interim payments of alleged pension withdrawal liability from Midwest in any other forum.” We granted Midwest’s motion for an injunction pending appeal. Central States then modified its motion for injunction in the Illinois action by dropping the request that Midwest pay withdrawal liability, but pushed ahead with its attempt to forbid Midwest from transferring assets. The Illinois court de *1018 nied the motion and Central States sought reviеw in the Seventh Circuit. Upon Midwest’s motion, we found Central States in contempt.
We have reconsidered the order finding Central States in contempt. Our order did not specifically enjoin Central States from seeking to prevent Midwest from transferring assets.
See Schmidt v. Lessard,
V.
For the foregoing reasons, we affirm. Midwest’s motion for leave to supplement the recоrd is granted. All other pending motions are denied.
