# MetaData information for customer

**URL:** <https://discuss.dwolla.com/t/metadata-information-for-customer/4436>\
**Category:** API Support\
**Created:** [September 15, 2017, 10:49am UTC](https://discuss.dwolla.com/t/metadata-information-for-customer/4436 "2017-09-15T10:49:55Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![spencer](https://sea2.discourse-cdn.com/dwolla/user_avatar/discuss.dwolla.com/spencer/32/2143_2.png) [@spencer](https://discuss.dwolla.com/u/spencer)\
**Post date:** [May 7, 2019, 3:57pm UTC](https://discuss.dwolla.com/t/metadata-information-for-customer/4436/4 "2019-05-07T15:57:02Z")

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Hi @abe, The API does support passing a `correlationId` when creating a customer. This was recently added an we just [updated the docs](https://github.com/Dwolla/v2-ach-api-docs/commit/23d97ab539c28fb8c1d7005d9a71318e7a16b176) to reflect the use of correlationId! Keep in mind that we do enforce uniqueness on this field across all the Customers you create. This field cannot be used as a substitute for `email` as email is a required field for all Customer record types. Hopefully this would solve for your needs relating to correlating users in your system with records created in Dwolla. Please let us know if you have any questions on usage!

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_[View the full topic](https://discuss.dwolla.com/t/metadata-information-for-customer/4436)._