Response Error Codes

Error codes can be seen in in the JSON response if you use AJAX and/or in the response email you receive on all submissions (form and AJAX).

Error Codes

Some errors are fatal and will stop the submission from being saved or emailed to you, while others are simply warnings and will not affect the submission.


Errors will stop the submission from being processed. Errors can be caused by failing to including a proper email or going over your monthly submission limit. You will receive an email notification about the error so you can fix it.


Warnings will NOT stop the submission from being processed. Warnings can be caused by small errors that won't affect the result of the submission.

Code Type Definition
1000 Error Unsupported request type. Slapform only accepts POST requests.
1001 Warning slap_debug enabled. This deactivates emails and webhooks but also won't affect your submission count for this period, so it's great for testing!
5000 Error Invalid Slapform account. Usually you get this error if you try to use [email protected]. We get dinged for bounced emails so we automatically block emails that look like test addresses. Just use your real email!
5001 Error No Slapform account provided. A valid email/account ID is required when using Slapform.
5002 Error Slapform account does not exist. You can view your account ID and email on
5003 Error Error retrieving Slapform account. A fatal error occured when retrieving the Slapform account. This is a rare error, please contact us if you receive this.
5010 Warning Invalid use of name trigger. Your submission contained a name trigger but you need a different plan to use this feature.
5100 Error Submission is too large. To see size limits of submissions, please review our pricing plans.
5101 Error No submissions left. You have used all of your submissions this period. To see monthly submission limits, please review our pricing plans.
5200 Error Spammy submission. This submission was detected to be spam and not submitted. This can be caused by automatic detection, the submitter failing to solve the captcha, or if the submission contains slap_honey, an Advanced Name Trigger.
5300 Error Error sending email. The email provided may have bounced or there may be a problem with the server. Please contact us if you receive this error.
5301 Error Email is blocked, invalid, or on an unsubscribe list. You can a href="">contact us to remove the block.
5310 Error Error sending email with slap_replyto. The replyto email provided may be incorrectly formatted.
5350 Warning Error sending webhook. The webhook url provided may be incorrect or offline.
5400 Error Error saving submission to database. Please contact us if you receive this error.
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