41 CFR § 102-38.240
What happens to the deposit bond if the bidder defaults or wants to withdraw his/her bid?
June 9, 2020
(a) When a bid deposit is secured by a deposit bond and the bidder defaults, you must issue a notice of default to the bidder and the surety company.
(b) When a bid deposit is secured by a deposit bond and the bidder wants to withdraw his/her bid, you should return the deposit bond to the bidder.