`MSISDN_TAKEN`

HTTP 409 — Number already in your book

Another customer of yours already has that number. One person, once, per business — the database holds it.

What to do

Find that customer with GET /v1/customers?msisdn=… and update them, rather than creating a second row for the same person.

Can I retry?

Not unchanged. Something in the request has to change first — retrying as-is gets the same answer.

The body you received

json

{
  "error": {
    "code": "MSISDN_TAKEN",
    "doc": "https://docs.pamopay.co/errors/MSISDN_TAKEN",
    "request_id": "req_5f3a9c2b1d4e6f7a8b9c0d1e"
  }
}

Quote request_id when you write to us; it finds the call without anybody grepping by timestamp.

All error codes