hyperledger/fabric · error

expected MSP ID %s, received %s

Error message

expected MSP ID %s, received %s

What it means

After successfully unmarshaling the SerializedIdentity, DeserializeIdentity compares its Mspid against the local MSP's name. This error means the identity belongs to a different organization/MSP than the one evaluating it, so this MSP cannot validate it. Thrown at msp/mspimpl.go:400.

Source

Thrown at msp/mspimpl.go:400

	}

	return errors.Errorf("The identity does not contain OU [%s], MSP: [%s]", mspRole, msp.name)
}

// DeserializeIdentity returns an Identity given the byte-level
// representation of a SerializedIdentity struct
func (msp *bccspmsp) DeserializeIdentity(serializedID []byte) (Identity, error) {
	mspLogger.Debug("Obtaining identity")

	// We first deserialize to a SerializedIdentity to get the MSP ID
	sId := &m.SerializedIdentity{}
	err := proto.Unmarshal(serializedID, sId)
	if err != nil {
		return nil, errors.Wrap(err, "could not deserialize a SerializedIdentity")
	}

	if sId.Mspid != msp.name {
		return nil, errors.Errorf("expected MSP ID %s, received %s", msp.name, sId.Mspid)
	}

	return msp.deserializeIdentityInternal(sId.IdBytes)
}

// deserializeIdentityInternal returns an identity given its byte-level representation
func (msp *bccspmsp) deserializeIdentityInternal(serializedIdentity []byte) (Identity, error) {
	// This MSP will always deserialize certs this way
	bl, _ := pem.Decode(serializedIdentity)
	if bl == nil {
		return nil, errors.New("could not decode the PEM structure")
	}
	cert, err := x509.ParseCertificate(bl.Bytes)
	if err != nil {
		return nil, errors.Wrap(err, "parseCertificate failed")
	}

	// Now we have the certificate; make sure that its fields

View on GitHub (pinned to 2736b63f8f)

Solutions

1. Use the MSP instance whose name matches the identity's Mspid (route by sId.Mspid via the MSP manager/identity provider instead of a fixed MSP).
2. Fix the MSP config so config.yaml 'Name' matches the organization's MSP ID used when the certificates were issued.
3. If the org MSP ID changed, reissue/re-enroll identities and update channel configuration (configtx) to the new MSP ID.

Example fix

# before: config.yaml of Org1 dir
Name: Org0MSP
# after
Name: Org1MSP  # must match Mspid embedded in SerializedIdentity

sId := &m.SerializedIdentity{}
if err := proto.Unmarshal(blob, sId); err != nil {
  return err
}
if sId.Mspid != expectedMSPID {
  return fmt.Errorf("identity belongs to %q, expected %q", sId.Mspid, expectedMSPID)
}

id, err := msp.DeserializeIdentity(blob)
if err != nil {
  if strings.Contains(err.Error(), "expected MSP ID") {
    return routeToCorrectMSP(sId.Mspid, blob) // resolve MSP by Mspid via mspmgr.GetMSP
  }
  return err
}

When it happens

Trigger: Calling DeserializeIdentity on a bccspmsp instance whose name differs from sId.Mspid — e.g. evaluating an Org2 identity against Org1's MSP, or an MSP directory whose config.yaml 'Name' was renamed after the certificates were issued.

Common situations: MSP ID mismatches between channel config and local MSP directories; typos in FABRIC_CFG_PATH MSP name; identities from another org submitted to a peer/channel policy; rebranding an org (MSP ID change) without reissuing identities.

Related errors

• failed unmarshaling identity %s
• collection-name: %s -- contains an identity that is not part
• Could not serialize the signing identity: %s
• access denied: channel [%s] creator org unknown, creator is
• Failed deserializing proposal creator during channelless che

AI-assisted analysis of hyperledger/fabric@2736b63f8f (2026-09-04). Data as JSON: /api/errors/d1c8d9824012b0c0. Report an issue: GitHub.