If a claim is made on your bond, the surety company will usually investigate the claim to determine if it is valid or not.
If the claim is not valid, there will be no further action, but you might be responsible for any costs associated with investing the claim.
If the claim is valid, the surety company will remind you of your obligations and give you the opportunity to satisfy the claim.
If you fail to respond, defend or satisfy the claim, the surety company might arrange a settlement with the Obligee, then proceed with collecting the settlement (and any other fees incurred) from you.
Read about the bond claim process here.