M2P Fintech API documentation

Errors related to customer registration, field validation, duplicate detection, and bank partner registration.

Code	HTTP	Message	Scenario	Resolution
`REG_001`	400	Missing mandatory field	A required field was not provided in the request	Check required fields for your tenant configuration
`REG_002`	400	Invalid mobile number	Mobile number is not 10 digits or has invalid format	Provide a valid 10-digit Indian mobile number
`REG_003`	400	Invalid ID number	ID document number does not match the expected format for the given `idType`	Verify format — PAN: 10 alphanumeric, Aadhaar: 12 digits
`REG_004`	400	Invalid email format	Email address is malformed	Provide a valid email address
`REG_005`	400	Invalid date of birth	Date format is wrong or date is in the future	Use `YYYY-MM-DD` format with a past date
`REG_006`	400	Invalid pincode	Postal code is not exactly 6 digits	Provide a valid 6-digit Indian postal code
`REG_010`	409	Duplicate customer	Customer already exists based on dedup rules (mobile + ID)	Use the existing customer's kit number
`REG_011`	409	Mobile already registered	Mobile number is linked to another customer record	Use a different mobile number or retrieve the existing customer
`REG_012`	409	ID already registered	ID document number is linked to another customer record	Verify customer identity or retrieve the existing record
`REG_020`	422	Product not available	The specified `productId` is not valid for your tenant	Verify the Product ID with M2P
`REG_021`	422	No cards available	All card numbers in the BIN range have been exhausted	Contact M2P for additional BIN capacity
`REG_030`	502	Bank registration failed	The bank partner API returned an error	Retry the request; if persistent, contact M2P support
`REG_031`	502	Core system registration failed	Internal registration processing error	Retry the request; if persistent, contact M2P support

Registration Errors