> ## Documentation Index
> Fetch the complete documentation index at: https://docs.peopledatalabs.com/llms.txt
> Use this file to discover all available pages before exploring further.

# FAQs - Person Enrichment API

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## What is the difference between the various Person APIs?

See [this section](https://docs.peopledatalabs.com/docs/person-endpoints#the-differences-between-our-person-related-apis) for a detailed breakdown of the differences between our Person APIs.

## If I submit a blank parameter in the request will the results be affected? e.g. profile=linkedin.com/in/seanthorne\&name=Sean Thorne\&company=

Submitting a blank value for a parameter will not affect the quality of the results. Any parameter with an empty value will not be considered when providing you with a match.

## Will I be charged for retrieving the same profile multiple times?

Yes. PDL will charge for the retrieval of the same profile.

**Example**\
You enrich for a profile with the LinkedIn URL: linkedin.com/in/linfluencer. A day later you enrich a profile with the same LinkedIn URL. You will be charged two credits, one for each successful response.

To handle for situations demonstrated in the above example , PDL recommends duplicate call detection. You can use methods like unique key constraints. For example, you can hash the request, storing the hash, and check for a duplicate call before sending it to the API.