The court, having heard arguments of counsel and considered the briefs and pertinent portions of the record, vacates the district court judgment and remands for further factual development as to whether Body Masters owed a debt to Ryerson Tull or J M Tull Metals, Inc. at the date of bankruptcy.

The summary judgment evidence does not eliminate any genuine issue of material fact concerning the identity of the entity to which Body Masters owed money at the date of bankruptcy. The invoices bear both companies’ names, and the conclusory affidavit of a lower level corporate agent fails to establish that the sales to and receipts from Body Masters were for the sole account of J M Tull Metals, Inc.

Contrary to appellee’s argument, the ambiguous stipulation entered in the *36 bankruptcy court effected no issue preclusion against Robert T. Cline (“Cline”) because the issue of the corporate identity of the creditor, whether Ryerson Tull, Inc. or J M Tull Metals, Inc., was not actually litigated and decided in that claim determination proceeding.

We also see no merit, from the vantage point of summary judgment appellate review, in Cline’s arguments that his 1984 letter guaranty to J M Tull Metals, Inc. is unenforceable.

Based on the foregoing conclusions, we also vacate the court’s 60(b) ruling on evidence offered untimely by Cline, because the court should reconsider its admissibility in connection with further proceedings.

Accordingly, the judgment of the district court is VACATED and REMANDED.