What credit card does Costco currently accept

Just VISA credit card only!

They accept any visa credit card. I use my BOA credit card there.

Your member card is Citi Bank

We recently used our Canadian Costco Mastercard to pay at the Colechester VT location.

Any debit visa

Costco Visa only

any

Citi Visa in USA.Master card in Canada.

Any VISA works.

Neither of those answers above are true. Costco only accepts their branded citi visa card, debit cards or cash. They do not accept generally issued credit cards.