# \[Support Guide\] Form problems, form debugging, 404 when submitting **URL:** \ **Category:** Support Guides\ **Tags:** netlify-forms, support-guide\ **Created:** [February 11, 2019, 5:11pm UTC](https://answers.netlify.com/t/support-guide-form-problems-form-debugging-404-when-submitting/92 "2019-02-11T17:11:03Z")\ **Posts on this page:** 1\ **Showing post:** 24
**Author:** ![riongull](https://sea1.discourse-cdn.com/netlify/user_avatar/answers.netlify.com/riongull/32/788_2.png) [@riongull](https://answers.netlify.com/u/riongull)\ **Post date:** [May 18, 2019, 4:37am UTC](https://answers.netlify.com/t/support-guide-form-problems-form-debugging-404-when-submitting/92/24 "2019-05-18T04:37:42Z")
In case anyone runs into the problem I had: I was having the same issue many of you ha{d|ve} - forms were showing up on app.netlify, but submissions were blank. After trying all the fixes in the various places on the internet it still wasn’t working. I finally realized my own submissions were being filtered by Netlify’s spam-filtering service provider. After reverse engineering the spam filter tests through trial and error I found that if you have a form field named “twitter”, the spam filter Gods REALLY want (need) your entered data to start with an “@” character. Wow! Lost more than a day of my life to these spam filter Gods. tl;dr - Make sure you enter good data while testing. For me that meant including “@” in my “twitter” field. --- _[View the full topic](https://answers.netlify.com/t/support-guide-form-problems-form-debugging-404-when-submitting/92)._