# Help with using forms for subscriber sign ups

**URL:** <https://community.hubspot.com/t/help-with-using-forms-for-subscriber-sign-ups/29990>\
**Category:** Tips, Tricks & Best Practices\
**Tags:** professional\
**Created:** [January 11, 2021, 3:14pm UTC](https://community.hubspot.com/t/help-with-using-forms-for-subscriber-sign-ups/29990 "2021-01-11T15:14:07Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![PNewton](https://d10pqhm3lwygmk.cloudfront.net/user_avatar/community.hubspot.com/pnewton/32/84083_2.png) [@PNewton](https://community.hubspot.com/u/PNewton)\
**Post date:** [January 11, 2021, 3:14pm UTC](https://community.hubspot.com/t/help-with-using-forms-for-subscriber-sign-ups/29990/1 "2021-01-11T15:14:07Z")

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Good afternoon,

We are currently using the forms function to collect email addresses for newsletters. I have two questions:

1) Is it possible to send new subscribers an email asking them to confirm/validate their submitted email information? We wish to prevent people signing up thrid parties to our subscription.

2) Is it possible to run a check on submitted postcodes so that we can auto populate the rest of the postal address?

Thank you

Paul

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**Author:** ![karstenkoehler](https://d10pqhm3lwygmk.cloudfront.net/user_avatar/community.hubspot.com/karstenkoehler/32/68554_2.png) [@karstenkoehler](https://community.hubspot.com/u/karstenkoehler)\
**Post date:** [January 11, 2021, 3:42pm UTC](https://community.hubspot.com/t/help-with-using-forms-for-subscriber-sign-ups/29990/2 "2021-01-11T15:42:19Z")

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Hi @PNewton,

Yes, this functionality is called double opt-in. You can find a step-by-step instruction here: [Set up double opt-in for emails](https://knowledge.hubspot.com/email/set-up-double-opt-in-for-emails)

If you want recipients to confirm the information they submitted (and not just the fact that they signed up), you would use personalization tokens in your confirmation email, e.g. “Thanks for signing up! Here’s the information you submitted: [personalization token for first name] [personalization token for last name]”, see also [here](https://knowledge.hubspot.com/cos-general/how-to-use-personalization-with-your-content#add-personalization-to-your-content).

Regarding your second question, HubSpot doesn’t support this type of real-time checking/populating.

Hope this helps!

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**Author:** ![PNewton](https://d10pqhm3lwygmk.cloudfront.net/user_avatar/community.hubspot.com/pnewton/32/84083_2.png) [@PNewton](https://community.hubspot.com/u/PNewton)\
**Post date:** [January 11, 2021, 4:51pm UTC](https://community.hubspot.com/t/help-with-using-forms-for-subscriber-sign-ups/29990/3 "2021-01-11T16:51:59Z")

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Thank you so much for this, much appreciated!