external_ref to store your own customer identifier.
Customer types
Recommended customer fields
Provider requirements vary by country, operator, and corridor. For payout and transfer flows, collect the fullest profile you can:- Name or business name
- Phone number in E.164 format
- Email address
- Country and nationality codes
- Date of birth
- Address and city
- Occupation and source of funds
For Yellow Card-backed payouts, make sure the customer profile includes
address_line1, city, occupation, and source_of_funds.KYC documents
Submit KYC documents throughPOST /customers/{customer_id}/kyc. Document files must be hosted at public HTTPS URLs that Bumxpress can fetch.
Supported document examples include national_id and passport. At least one file URL is required per document, such as front_file_url, back_file_url, or selfie_file_url.
Status tracking
Read KYC state withGET /customers/{customer_id}/kyc. Store the returned kyc_status and document IDs in your system so support and compliance teams can reconcile provider requirements.