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Mailchimp Invalid Merge Tags


Having Mailchimp merge tag conflicts and errors often occurs when the required field in your CRM is blank when synced into Mailchimp. 

01 March 2022 09:49:36


Error for the record:, message: Your merge fields were invalid.[{field=JOBTITLE, message=Please enter a value}], code: 400

How to overcome this issue?


Option 1: Fill in the required field in CRM, then Reset Sync Process and Resync.

Option 2: Make the field "not required" in CRM so that the error will not appear in Mailchimp.

Option 3: In some cases, the errored field in Mailchimp might be required so you will also need to map that field in Step 4 of the Set Up so that the error will be fixed. Save, Reset Sync Process, and resync.

Side Note: For any boolean/checkbox field type you add in the future, just provide both options in the dropdown: true-false or yes-no in Mailchimp to then map to CRM, which will work great.

After updating dropdown values, refresh field mapping, so SyncApps knows the values to match.

Another error, Code 400, which occurs in Mailchimp integrations:


Error Message

23 March 2022 17:57:29

Error for the record:, message: has signed up to a lot of lists very recently; we're not allowing more signups, for now, code: 400

This is a common error that Mailchimp gives you, and unfortunately, the only solution is to call or email your Mailchimp account support, who can fix it.

Mailchimp is sometimes rejecting these emails like (or the stated email addresses), so ask Mailchimp support and provide a List for them you’re needing to move over or upload via CSV to see if they accept them.

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