# Same cpsidp for two different individuals?

**URL:** <https://forum.ipums.org/t/same-cpsidp-for-two-different-individuals/978>\
**Category:** CPS\
**Created:** [August 2, 2015, 6:01pm UTC](https://forum.ipums.org/t/same-cpsidp-for-two-different-individuals/978 "2015-08-02T18:01:00Z")\
**Posts on this page:** 1\
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**Author:** ![mg2014](https://avatars.discourse-cdn.com/v4/letter/m/a698b9/32.png) [@mg2014](https://forum.ipums.org/u/mg2014)\
**Post date:** [August 2, 2015, 6:01pm UTC](https://forum.ipums.org/t/same-cpsidp-for-two-different-individuals/978/1 "2015-08-02T18:01:00Z")

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I understood that the variable CPSIDP is an unique identifier for each individual. I have seen in the data that there are individuals with the same CPSIDP but different birth place for example (they match in CPSIDP, age, sex and race). In which cases is this posible?

Thank you

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