How does the API handle control characters?
As you add ads and creatives, the system checks all the fields for certain control characters that are not allowed. The system will remove the following characters if they are found in the fields: • Any character below #x0020 Exceptions: #x0009 (tab), #x000A (line feed), #x000D (carriage return) • Character range #xD800 to #xDFFF (permanently unassigned code points) • Characters #xFFFE and #xFFFF (special-purpose characters) • The Delete character (Oct 177, Dec 127, Hex 7F) Exception: The system will not check the htmlTagWithMacros field in custom HTML ads and tagWithMacros field in third-party ads for control characters.