Declined transactions appear on the Declines tab of the Transactions page, and on the Declines tab of each card's details page. What you see there depends on your role on the business account.
What each role sees
Owner, Admin and Viewer: every declined transaction on the account.
Spender and Supervisor: declined transactions on cards you own.
Why a declined transaction might be missing
Declines are recorded against the card's owner. If someone shared a card with you, or you have access to it through a shared spend account, that card's declines stay with the person who owns it. They won't appear on your Declines tab, and the card's details page won't show a Declines tab for you.
This only affects what you can see. The card works the same way, and the card's owner and the account's Admins can still see every decline.
What to try
Ask the card's owner or an account Admin to check the Declines tab. They can see the decline and its reason.
If you regularly need to review declines on cards you don't own, ask an Admin about your role on the account.
A declined transaction isn't a charge
When a transaction is declined, the purchase didn't go through and nothing is taken from the card or the spend account. A decline you can't see doesn't mean anything is wrong with your access. For common reasons a card declines, see Why is my virtual card declining?
FAQ
Can I see why a card I use was declined?
Can I see why a card I use was declined?
If you own the card, yes. Open the Declines tab on the Transactions page, or the Declines tab on the card's details page. If the card belongs to someone else, ask them or an account Admin.
Where can I learn more about roles?
Where can I learn more about roles?