Downstream Data Coverage is the only professional liability insurance:

There is only one professional liability product created specifically to compliment NAID AAA Certification. It is also the only professional liability product offered for which the ultimate goal is to reduce the cost of coverage to members and ensure their clients are properly protected.
In time, customers will certainly come to appreciate service providers who rely on coverage that they can trust and that is specifically designed for their protection.

You owe it to your organization to look beyond verbal assurances and make sure your data-related service provider’s professional liability coverage really protects your firm. Many policies don’t.
You can either try to decipher confusing insurance policy language or insist they have a policy, like Downstream Data Coverage, that was developed specifically for your protection and that is backed by a trusted source.