eBay do these one off spot checks on accounts / bank accounts it's a security measure.
You are a new seller they just wish to be double sure the bank account being used, is being used by the genuine account holder.
When that micro deposit of a penny arrives in your bank account, confirm it bank , should be a message asking for this. It's verified and if correct your on your way again to list items for sale, and receive payouts from those sales.
@chigu_876