# Why can’t I access my e-form using my serial number and email address. What should I do?

**URL:** https://reachback.builtintelligence.com/t/why-can-t-i-access-my-e-form-using-my-serial-number-and-email-address-what-should-i-do/1294
**Category:** CDM
**Created:** [13 January 2013 09:36 UTC](https://reachback.builtintelligence.com/t/why-can-t-i-access-my-e-form-using-my-serial-number-and-email-address-what-should-i-do/1294 "2013-01-13T09:36:39Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![HSE](https://avatars.discourse-cdn.com/v4/letter/h/e95f7d/32.png) [@HSE](https://reachback.builtintelligence.com/u/HSE)
#### Post date: [13 January 2013 09:36 UTC](https://reachback.builtintelligence.com/t/why-can-t-i-access-my-e-form-using-my-serial-number-and-email-address-what-should-i-do/1294/1 "2013-01-13T09:36:39Z")

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<div class="post-metadata">

### Author: ![HSE](https://avatars.discourse-cdn.com/v4/letter/h/e95f7d/32.png) [@HSE](https://reachback.builtintelligence.com/u/HSE)
#### Post date: [25 January 2013 10:22 UTC](https://reachback.builtintelligence.com/t/why-can-t-i-access-my-e-form-using-my-serial-number-and-email-address-what-should-i-do/1294/2 "2013-01-25T10:22:03Z")

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You may have used illegal characters in the E-Form that have been saved into the database record. When you try to retrieve it, the database thinks the record is invalid. The error message is usually:

"The server provided an invalid response null”.

Or there might be an error in the CDM Coordinator email address. When this happens the error message is:

“The existing notification was not found in our database. Please check your serial number and email address with your email acknowledgement.”