Most of your post is filled with inaccuracies. For starters the whole concept depends on what state you are in. There are 12 two party states where all members of a conversation have to consent to a conversation being recorded. If you are talking about one of those 12 states then the company can't "tell" their employees their calls may be recorded. The company has to receive "consent", which is quite different from "telling". Usually this is done by having them sign a consent form when they are hired. In those cases, the company ALSO has to have consent from the other side of the conversation. So if you are in California (a two party state) and Griffin's Widgets decides they want to record their employee's phone calls, they ALSO have to get consent from the person they are talking to. This is normally done by a recording played at the beginning of the call prior to a customer being connected to an employee. I'm sure you've heard them. "This call may be recorded or monitored for whatever purpose blah blah blah" The tricky thing is, this also gives the customer the right to record the conversation since at that point both parties have consented to being recorded.
So, here are the possibilities:
1. The person being recorded is in a single party state - no worries, completely legal
2. The person being recorded is in a two party state and there's one of those lovely this call may be monitored or recorded notices before they answer - no worries, you have both consented to being recorded
3. The person being recorded is in a two party state and the employer has had them sign a consent form and the shop is being done by the employer - no worries, they have received consent from the employee
4. The person being recorded is in a two party state and this is a competitor shop and there is no notice at the beginning of the call - oooooops you have possibly committed a crime.
For the record the 12 two party states are:
California
Connecticut
Florida
Illinois
Maryland
Massachusetts
Michigan
Montana
Nevada
New Hampshire
Pennsylvania
Washington
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