Show transactions from "Unknown Payment Account"

Clients submit receipts from apps like Dext or the built-in receipt capture in QBO. Sometimes they submit things that don't show which payment account was used OR it shows a card # I don't recognize. Would be nice to record these to a bank account named something like "Unknown Payment Account" and have it show up in the dashboard. The only way to do that today is to also categorize to something like "Uncategorized Expense", but I typically already know which category… I just need the client to clarify the account used to pay. Thank you.