Served as a go-between

Usage examples of liaised.

Pendergast had shown up without a car and driver, no backup, and he hadn’t liaised with the local Dodge office.

It was he who had liaised so successfully with the upper-echelon officials when MacArthur had given the defeated Japanese a new democratic Constitution which had survived into the present.

You probably liaised mostly through an enforcer called Trepp, out of New York, The woman you're dealing with ultimately is Reileen Kawahara.

I've liaised with the commissary at High Vrazel to help with quantities of game and staples when the extra bods start arriving.