I'm a web, database, and network architect based in NYC, with specializations in the financial services, publishing, and SaaS sectors.
I build complex Marketo integrations for companies large and small... and can make Marketo forms and emails do things you never thought possible!
Check out my blog at https://blog.teknkl.com, which has Marketo-specific technical insights you won't see anywhere else, along with wider topics from my programming and systems work.
This has been discussed before. It's not supported by Marketo because it uses a specially crafted MIME attachment, and Marketo doesn't support attachments.
No need for the curly braces, and a String field on the Person can never be null or false.
To use a field only if it has at least one non-whitespace character, you only need:
#se...
Why do you say “this will only display info from the most recent custom object record”? That’s not so. You have access to the last 100 CO records in Velocity. It's an iterable List...