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The Request contact node sends a message with the Share contact info button so the user can share their WhatsApp contact card. Use it to get the phone number of users who arrive identified only by their username or BSUID, and to hold the flow until you have it.

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Configuration

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General

The button text is fixed: Share contact info.

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Advanced

Advanced tab with Mandatory selection turned on and the Phone number option selected

Advanced tab of the Request contact node

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What the user must share

WhatsApp lets the user choose which details from their card they share, and the button can’t restrict that. That’s why the node enforces the requirement, with two mutually exclusive options: With either option, if the user replies with free text instead of tapping the button, they get the Retry message. A contact card sent from the attachments menu doesn’t unblock the node either: the user has to use the button.
Nodes that already had Mandatory selection turned on behave as Phone number without you having to reconfigure or republish them.

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Using the captured number

When the user shares their number through the button and didn’t have one on record yet, the number is linked to the user and is available in the following nodes of the same execution:

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Use cases

A banking workflow that receives users identified only by BSUID needs the phone number to verify their identity: Request contact with Mandatory selection and Phone number keeps the flow from moving on until it has it, and the Retry message tells the user what’s missing.
A lead capture workflow wants to save the user’s contact without stopping the conversation: Request contact with Username accepts any shared card and leaves the number optional.
This node only works on WhatsApp channels.

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Next steps

Location Request

Ask for the user’s location with an interactive button

Contact

Send a contact card to the user