Currently there is not a way to remove the eReceipt within NetCommunity database and delete the link associated with it.

If you need to void an eReceipt for a donor; this can be done within Raiser's Edge, please see How to void a receipt for Canadian organizations

If you need to reissue an eReceipt for a donor; this can be done within Raiser's Edge also, please see What is the difference between Reissue Receipts and Reprint Receipts in Mail?