Can a collection agency put a hold on your bank account in any instance
A collection agency can put a hold on your bank account in any instance if it is authorized by a court. Otherwise they cannot garnish your wages or freeze checking accounts. This provision is stipulated in the Fair Debt Collection Practices Act.
If there has been a judgement filed against you, then yes they can put a hold on your account.
Yes, they can and also garnish money from your bank or from your job.