"why are you recommending "Other Assets" account to record credit card related transactions?"
Company A's credit card was "used by someone else" so that is Other Asset = Loan to this other entity. Company A is not incurring an expense. They are More In Debt because their Credit line was used for a purpose that is not theirs. That means Company B needs to Repay Company A (directly or directly, as we have seen in this topic). That is why this is not a P&L event and is on the Balance Sheet as Other Asset.
The other option would be Equity. The Person that Used the credit card can be considered "personally benefitting" by using a Business card, which might qualify as Owner Draw or Distribution.
This is why you should not commingle, and this is why you should ask your own CPA how to handle these events.
