Two things.
1. Be leaving the card open, the bank is still responsible for any subsequent unauthorized charges. We can't hold the customer responsible for our failure to act. See the commentary to 1005.6(b)
3. Limits on liability. The extent of the consumer's liability is determined solely by the consumer's promptness in reporting the loss or theft of an access device. Similarly, no agreement between the consumer and an institution may impose greater liability on the consumer for an unauthorized transfer than the limits provided in Regulation E.
As to withdrawing and the resubmitting a claim, this is covered by 1005.11(e) and commentary:
(e) Reassertion of error. A financial institution that has fully complied with the error resolution requirements has no further responsibilities under this section should the consumer later reassert the same error, except in the case of an error asserted by the consumer following receipt of information provided under paragraph (a)(1)(vii) of this section.
1. Withdrawal of error; right to reassert. The financial institution has no further error resolution responsibilities if the consumer voluntarily withdraws the notice alleging an error. A consumer who has withdrawn an allegation of error has the right to reassert the allegation unless the financial institution had already complied with all of the error resolution requirements before the allegation was withdrawn. The consumer must do so, however, within the original 60-day period.
Since we did not complete an investigation when the customer first provided notice, we must complete one now since less than 60 days have passed.
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