Issue
There are several special characters that are rejected by the Marketo system on the backend and which can cause errors or strange behavior when attempting to use them in asset or field names. These characters are:
[ ' " < > { } ; ]
Solution
These characters should not be used because they are often used in code and scripting languages. Generally, Marketo will give an error if this is attempted. However, in the event that the name is accepted there is a good chance that you will see some strange behavior when attempting to use the asset or field. There is a large range of different behaviors that can result and they are all very unpredictable, so the best choice of action is to not use these characters with asset or field names at all.
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