Below is the FI (data fetch) notification status.  Link to the document. 

Individual account FI status

Explanation

PENDING

FIP has received the account data request

READY

FIP is ready with the requested account data

DELIVERED

FIP has delivered the requested account data

TIMEOUT

The account data request to the FIP has timed out

DENIED

FIP has denied sharing the requested account data

Individual account FI status

Explanation

PENDING

FIP has received the account data request

READY

FIP is ready with the requested account data

DELIVERED

FIP has delivered the requested account data

TIMEOUT

The account data request to the FIP has timed out

DENIED

FIP has denied sharing the requested account data

Combined data session status

Individual account FI status

PENDING

Individual account FI status of all accounts in the data session is in PENDING status. Data fetch for this data session cannot be initiated yet.

PARTIAL

One or more accounts have individual FI account status as READY but the remaining have the status as PENDING/FAILED/TIMEOUT. Data fetch for this data session can be initiated. However, only data from READY accounts can be fetched.

COMPLETED

Individual account FI status of all accounts is READY. Data fetch can be initiated for this data session.

EXPIRED

The data session has expired, irrespective of individual account FI statuses. No further fetches can happen for this data session.

FAILED

The data session has failed, irrespective of individual account FI statuses. Retry by creating a new data session.