BTW, a health insurance company told me today that it's completely impossible to correct an inaccurate invoice, or issue a corrected invoice for any period. Seriously. They cannot correct erroneous invoices; they just tell you a corrected total over the phone but provide no documentation.
As always, they blamed the "computer system" doesn't "allow regeneration of invoices".
I almost asked for a copy of the source code so I could fix it. OTOH, I don't know COBOL so it'd be an uphill battle to fix it, I suspect.
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