Notice i start off with her reminding them, then only touching interest for at least 2 years. Eventually if they don’t catch it it most certainly is hers, but you need to give them time. The important thing is to not take the money and run. They’ll probably catch up eventually, probably Tuesday, or at the latest with end of month processing. But if they don’t they don’t. If you tell them twice and wait years and they still don’t catch it eventually it’s too bad for them.
Let me put it this way, Their memory exceeds your life expectancy.
No it is not hers if they dont correct it, that is absurd. Nor does she have any right to touch the interest. Period.
Tell her company and if she wants to, tell everyone in writing but this will be corrected soon. Do NOT transfer that extra money or touch it, interest, or anything else to do with the extra money in any way shape or form.
Just my OPINION not meant as legal, accounting, or any other advice to you or your daughter.