Currently in the United States, there are only 37 states and DC that are considered One Party States, which means that only one person on the call needs to know they are being recorded, in this case, it would be you.
Below is a list of the 37 States that are a One Party State.
Alabama
Alaska
Arizona
Arkansas
Colorado
District of Columbia
Georgia
Hawaii
Idaho
Indiana
Iowa
Kansas
Kentucky
Louisiana
Maine
Minnesota
Mississippi
Missouri*
Nebraska
Nevada*
New Jersey
New Mexico
New York
North Carolina
North Dakota
Ohio
Oklahoma
Rhode Island
South Carolina
South Dakota
Tennessee
Texas
Utah
Vermont**
Virginia
West Virginia
Wisconsin
Wyoming
If you do not see your State listed, you can NOT record the call. But as always, I am NOT a lawyer, so check with your own lawyer before recording anything that you will use.