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The best approach is to query the agent first and ask them what their preference is. It is unlikely that they all have the same policy. Asking them first shows them that you are aware of the issue ...
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#4: Attribution notice removed
Source: https://writers.stackexchange.com/a/23588 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#3: Attribution notice added
Source: https://writers.stackexchange.com/a/23588 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#2: Initial revision
The best approach is to query the agent first and ask them what their preference is. It is unlikely that they all have the same policy. Asking them first shows them that you are aware of the issue and willing to adjust if required. That shows professionalism, which counts for a lot with agents.