TOPEKA, Kan. (AP) — A 75-year-old Topeka man has admitted arranging fraudulent marriages for foreign nationals to help them become legal, permanent U.S. residents.

The U.S. Attorney’s office said Thursday that Quong Bow Low pleaded guilty this week to one count of conspiracy to commit marriage fraud in a scheme that went on from 1992 to 2013. Prosecutors had filed the charge in late April.

Low admitted charging thousands of dollars to find U.S. citizens to participate in arranged marriages. His paid services also included coaching couples before their citizenship and immigration interviews, providing documentation of the marriages and letting couples list his home as their addresses.

Investigators identified about 40 arranged marriages in which Low was involved.

Sentencing is scheduled for Aug. 1.