An Additional Identifier (AI) is a number consisting of 8 digits.
The initial counter value is 1000000, which is subsequently increased by 1. Thus, the first AI in the system will be 10000018, the second 10000024, the third 10000030, and so on. The maximum AI value will be 99999994.
AI is assigned to all open and closed sections on passive depo accounts.
Since May 12, 2015, after assigning AIs to all existing sections, an AI is automatically assigned to each new section.
AI has been added as a separate additional field in the listed below reports in dbf format. To display AI in printed report forms, an additional field is not introduced; instead, AI is indicated after the section in brackets. (Example 1)
In the tabular part of reports, AI is also indicated after the section in brackets. (Example 2)
For reports sent in ISO 15022 format, the client can choose what should be reflected in these messages:
Depo account + section (default option)
Additional Identifier
To display AI in ISO 15022 format reports, the client must generate operation 93, in which they select "yes" for the parameter "Specify section identifier in SWIFT reports..." either for the entire depo account or for a selected section. After connection, all ISO 15022 format messages for the selected depo account or selected section of the depo account will contain only the additional identifier. (Example 3)
To obtain information on depo accounts, sections of depo accounts, and assigned AIs, a special request AA008 "Notification on accounts / sections of depo accounts" is used within operation 42. Based on such a request received from the client, a report/notification is generated. (Example 4)
Possible options for request AA008:
list of all accounts (or only open accounts, or only closed accounts)
list of all accounts and all sections (and their identifiers)
list of all sections (and their identifiers) on a specified depo account
AIs are not mandatory for use. Clients may continue to use the existing numbering of accounts and sections without any changes or restrictions.
Since August 10, 2015, NSD clients in an instruction sent to NSD via EDI, SWIFT channel, or on paper, may specify either the depo account number and section code, or the additional identifier. Simultaneous specification of both the account number with section and the additional identifier is not allowed.
In a depository instruction or clearing instruction, the details of one party (e.g., "Sender") may be specified using the additional identifier, while the details of the second party (e.g., "Receiver") may be specified via the depo account number and section code (Example 5). An exception is operation code 20, for which it is necessary to specify either only the section codes for debiting and crediting securities, or only the identifiers of such sections (Example 6).
The method by which party details are specified does not affect the matching of instructions requiring counter-instructions. Instructions with AI are matched without restrictions with instructions specifying section codes. (Example 7)
Upon receipt of an instruction with an additional identifier at NSD, its presence in the NSD database is verified, along with other standard checks based on the calculated depo account number and section code derived from the AI. If the additional identifier cannot be found or standard checks on the calculated depo account and section fail, the instruction is cancelled. When transferring securities between sections within one account (operation 20), the operation will be rejected if the depo account numbers corresponding to the identifiers do not match.
If the additional identifier is filled in the instruction, it is filled and displayed in the printed form. If the depo account number and section code are specified in the instruction, the depo account number and section code are filled and displayed in the printed form; the additional identifier of the section is not displayed.
Error texts indicating the depo account section will also contain identifiers, which are indicated in brackets after the section code. If a section is opened by transfer, the section identifier is not indicated in the error text. Also, when making transfers to a non-existent section that is opened by default upon execution of the transfer, it is always necessary to specify the section code, and the use of AI is not allowed.
In administrative operations (07, 90, 91, 93, 97), it will not be possible to use the additional identifier; only the depo account number and section code can be used.
In instructions sent in ISO 15022 (SWIFT) format, clients can specify either "depo account + section code" in the previous format, or the AI. The AI must be specified in the following format: ::97A::SAFE//8!x. The possibility to use AI is provided in the following instructions: