I think the commonality is that all 3 professions would get paid for updates the clients requested, but mistakes made by the professional would have to get cove

I think the commonality is that all 3 professions would get paid for updates the clients requested, but mistakes made by the professional would have to get covered. Updates: Additional photography sittings, design modifications, bug fixes. Mistakes: Lost data, work that is later found to not meet the spec. But in the end, it all comes down to how you want to run your business. If you charge the customer for whatever extra you're doing, what's going to be the result of this? Are you going to chase them off? Get a bad recommendation? Is there no harm at all? Depending on that outcome and what you want, you can probably find the answer as to whether you should cover it or not.