In Oshkosh Truck, supra, 530 F.2d at 748-49, however, where the charging party's objections pertained to the terms of an informal settlement agreement, we decided that it was not entitled to a full evidentiary hearing but only to "an opportunity... to insure that [its] interests in the dispute will at least be considered before the matter is resolved," 530 F.2d at 748 (quoting Concrete Materials of Georgia, Inc. v. NLRB, 440 F.2d 61, 68 (5th Cir. 1971)).