What would you do if you think your helper has stolen something?
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Test your helper. Leave some dollar notes in some not too obvious places where she cleans regularly. Take down the serial numbers of the notes. I have tried this before but in my previous workplace and unfortunately, the money was gone. I could hv gone to the police but eventually let it go.
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Without any evidence i wouldnt raise the matter up. You mentioned you think, thats not concrete. And if that is not true, things are going to turn sour.
I would check her bag when she is out of the home and see if there is anything
thanks