Как перевести:

"Transmittal Sheet In (TSI)" и "Transmittal Sheet Out (TSO)"???

Контекст:

"Concerning documents transfer to COMPANY with Input Transmittal Sheet In (TSI) and return of comments to ENGINEER by COMPANY with Transmittal Sheet Out (TSO), please refer to Document Management Procedure"

"All formal correspondence (letters, faxes, Transmittal Sheets In) will be signed "