How to deal with Bank Guarantees in AR

Hi Experts,

Can you please suggest Solution for my below requirement.

Scenario:

I have certain customers, where I have deposit certain Amount in advance as Bank Guarantee, before rendering our service. Bank will deduct some amount on our behalf as Bank Guarantee for our customer.

Once the Service is done before the due date, then the bank will refund our bank guarantee amount back to our account.

So how to deal the Bank Guarantee when the bank deducts our account & once the service is rendered before the due date, bank will refund back our guaranteed amount to our account.

Please advise