210 Pa. Code § 2156
When, because of exceptional circumstances, the parties are not able to cooperate on the preparation of the reproduced record as a single document, the appellee may, in lieu of proceeding as otherwise provided in this chapter, prepare, serve, and file a supplemental reproduced record setting forth the portions of the record designated by the appellee. A supplemental reproduced record shall contain the certificate of compliance required by Pa.R.A.P. 127. "Confidential Information" and "Confidential Documents", as those terms are defined in the Case Records Public Access Policy of the Unified Judicial System of Pennsylvania, shall appear in the reproduced record in the same manner and format as they do in the original record.
210 Pa. Code § 2156