Wiktionary
routing slip
n. A slip of paper that specifies a route for a document to circulate.
Usage examples of "routing slip".
It was without surprise that he back-tracked Merritt to a counter in the General Delivery room of the Petersburg mail depot where he had peeled off a routing slip addressed to him and replaced it with the one that would carry the toxin to Follard.
The routing slip indicated it had come from the California State Police Juvenile Division central files department and must have arrived when he was at the Bay View.
I showed her the routing slip attached to each one, which the Shipping Department kept for its records once the package was on its way.
He pulled a routing slip from his drawer and rubber-banded it to the records package.