No money has been actually taken, and therefore no money needs to be refunded. It is only a "charge pending" on the card. This means that Airbnb are authorised to levy the charge, but they will only do so if the host makes a claim, and the claim is upheld. Therefore if there were no issues-claims, then no refund will be issued.
Here is some of what Airbnb have to say on the matter of Security Deposits.
How does Airbnb handle security deposits?
Hosts can add a security deposit to their listing, as long as they add it before a reservation is booked.
If a host wants to make a claim on the security deposit, they must do so within 48 hours of the checkout date. If a claim is made, Airbnb will mediate and collect payment from the guest, as necessary.
Security deposits can't be handled off-site in cash, as off-site payments are a violation of our terms.
It is very unclear in the information that AirBNB simply holds the security deposit as a pending charge. The host should be able to initiate a full refund or cancel any 'pending charge' immediately after a guest checks out if there are to be no claims.
Here is a couple of quotes from 2 different sections of the Help Centre information articles.
When I read them it appears that the new information clashes with the old information.
In the past it was my understanding that 48 hours after check out the pending charge automatically expired.
If your listing requires a security deposit, you won’t be charged unless the host files a successful claim within 48 hours of your checkout.
If a host wants to make a claim on the security deposit, they must do so within 14 days of the checkout date or before a new guest checks in, whichever is earlier. If a claim is made, Airbnb will mediate and collect payment from the guest, as necessary.
They actually debit your credit card the total amount for your stay - including rental cost and security deposit - so airbnb has to credit your card the security deposit amount (assuming there is no claim). I'm waiting for my credit...
Go to the reservation and take a look at your invoice. Is there a security deposit chargeed ? I think not. Personally, I have only rented once with someone with a security deposit, and as said above, it was not charged in the first place. It is only a reserved right to charge if there is a claim.
Thanks for the feedback. I was only looking at my bank account and noticed the initial charge included the security deposit, and I don't see a credit for the $250? Maybe I'm missing something.
When I booked a condo on Airbnb, a security $390 deposit was taken out of my account(Subtracted from my bank account). Then, 2 payments equaling the rental amount were taken out of my account. So actually, $390 was taken out of my account for a security deposit.
Airbnb does not take security deposits.
There should be nothing to refund.
There is the concept of the "virtual" security deposit, but no funds are taken from the guest ahead of time. Only after the trip, if there is actual damage and the guest agrees is the "security deposit" taken.