Why client allocation messages must be machine-readable

Final report ESMA74-2119945926-3749 requires investment firms and professional clients in the European Union to exchange allocations and confirmations by electronic, machine-readable messages from December 7, 2026, in place of oral or domestic routines.

The duty is the second subparagraph of Article 6(2) of Regulation (EU) No 909/2014, the Central Securities Depositories Regulation (CSDR). The European Securities and Markets Authority (ESMA) dated final report ESMA74-2119945926-3749 October 16, 2026, and Annex IV applies the guidelines from December 7, 2026. Regulation (EU) 2025/2075 sets the Union's trade-date-plus-one (T+1) cycle on October 11, 2027. What follows is the clean guideline text, the choices ESMA kept, and the clocks in the United Kingdom and the United States.

Key facts

• Final report ESMA74-2119945926-3749, dated October 16, 2026, revises the October 2019 guidelines on the second subparagraph of Article 6(2) of Regulation (EU) No 909/2014. Source: the final report.
• Annex IV states: "These guidelines apply from 7 December 2026," with the relevant provisions of the regulatory technical standards (RTS) on settlement discipline. Source: ESMA74-2119945926-3749.
• The Commission adopted the amendments on July 6, 2026. The Official Journal published Commission Delegated Regulation (EU) 2026/1536 on October 14, 2026. ESMA aligns the guidelines with Articles 2 and 3 of the RTS. Source: ESMA74-2119945926-3749.
• Regulation (EU) 2025/2075 of October 8, 2025 sets T+1 on October 11, 2027. Guideline 2 follows Article 5(1) of CSDR, which the report says is wider than Article 5(2). Source: ESMA74-2119945926-3749.
• The first EU T+1 Industry Committee survey, as the report cites it, found that most respondents (56%) could be late with allocations and confirmations on T+0 "by the end 2026". Footnote 14 ties that test to recommendation MC-02. Source: ESMA74-2119945926-3749.
• Of 18 responses on the date, 13 agreed with December 7, 2026. ESMA rejected a delay to the end of March 2027. Source: Annex I, question 10, and section 9.3.
• Routine oral allocations come out. Recorded calls survive only for a documented temporary disruption, under Article 16(7) of the Markets in Financial Instruments Directive (MiFID II) and Article 76 of Commission Delegated Regulation (EU) 2017/565. Source: Annex IV, guideline 4.

Methodology and sources

The operative text is Annex IV of ESMA74-2119945926-3749, the clean guidelines. Annex III still shows deleted sentences, including the old oral option, so it is not treated as the rule. The consultation paper was published on May 26, 2026. Responses ran from the end of May to the beginning of July 2026. The report prints no single closing day. The October 2019 baseline is reference esma70-151-2461.

Related:ESMA shrinks the list for delaying inside information

Dates for October 11, 2027 and for Commission Delegated Regulation (EU) 2026/1536 come from the final report. Recommendation MC-02 is taken from the committee's June 30, 2025 high-level roadmap. The United States comparison uses the Federal Register release of March 6, 2023 and 17 CFR 240.15c6-1 and 17 CFR 240.15c6-2. The United Kingdom comparison uses the Financial Conduct Authority (FCA) T+1 page and its letter. No search-volume figure is used. Press release ESMA71-545613100-2889 is cited only for the chair's remark.

What the clean guidelines require of the message

The second subparagraph of Article 6(2) already required the allocation and the confirmations before the intended settlement date. The October 2019 guidelines added an oral option and a domestic standard. Both contradict Commission Delegated Regulation (EU) 2026/1536. Regulation (EU) 2025/2075 fixed October 11, 2027.

An allocation message under final report ESMA74-2119945926-3749 is the written allocation, and where the parties still use one, the written confirmation, sent so the investment firm holds the settlement details on the business day of the transaction. Annex IV applies from December 7, 2026, the date the report gives for the amendments Commission Delegated Regulation (EU) 2026/1536 makes to Articles 2 and 3 of Commission Delegated Regulation (EU) 2018/1229. The content must be structured so software can identify, recognise and extract specific data, including individual statements of fact, and their internal structure. Paragraph 43 takes that test from Article 2(13) of Directive (EU) 2019/1024. Email and a graphical user interface (GUI) are examples only, and only if the content meets the test. The firm must also ensure the international open standards for messaging and reference data in Article 2(1)(34) of Regulation (EU) No 909/2014.

Guideline 1 says the arrangements "may be documented in any legally binding form". ESMA will not grandfather an existing contract. Of 17 responses, a large majority were supportive. Guideline 2 keeps the Article 5(1) instruments, and paragraph 156 says Regulation (EU) 2025/2075 did not narrow that list. Paragraphs 62 and 63 refuse a carve-out for bonds, repurchase transactions and securities lending. ESMA had no quantitative evidence of a blocking point.

The client is the professional client in point (10) of Article 4(1) of MiFID II. Persons exempt under Article 2 are out. An Annex II, Section I entity stays in even if treated as an eligible counterparty under Article 30(2). Where two investment firms face each other, paragraph 14 says the roles must be analysed. The perimeter question is treated in how EU regulators draw the MiFID II perimeter.

Clean paragraph 17 allows both documents, a confirmation inside the allocation, or neither, where Article 2(3) of Commission Delegated Regulation (EU) 2018/1229 applies and the firm already holds the data, including in a centralised database. The report does not turn Article 2(2) into a clock. Paragraph 18 says a late message is not addressed in CSDR, and paragraph 79 says the parties need not write a remedy.

All 18 responses on screens said a screen can work if the output is machine-readable. Paragraph 45 accepts manual entry for low-volume clients on that test. Paragraph 46 expects high-volume clients to limit it. Paragraph 107 says revised Article 2(1) "does not foresee any sort of exception". Paragraph 50 says naming one industry standard does not seem necessary at this stage. Of 17 responses, 15 broadly supported mandatory international open standards. Clean paragraph 19 says firms "should ensure" Article 2(1)(34). The 2019 domestic-standard option is deleted.

How the Union, the United Kingdom and the United States time the message

The European Union, the United Kingdom and the United States do not set one clock on an allocation. Final report ESMA74-2119945926-3749 applies the revised guidelines on December 7, 2026, and Regulation (EU) 2025/2075 sets the Union cycle on October 11, 2027. The report states no legal hour. It says 56% of respondents to the first EU T+1 Industry Committee survey could be late with trade-date allocations by the end of 2026, and footnote 14 points that finding at recommendation MC-02. The June 30, 2025 roadmap says those messages should go no later than 23.00 on trade date. That line is an industry recommendation, not Annex IV. In the United States, 17 CFR 240.15c6-2 requires the message as soon as technologically practicable and no later than the end of the trade date, with compliance on May 28, 2024.

Sources: ESMA74-2119945926-3749; Commission Delegated Regulation (EU) 2026/1536; Regulation (EU) 2025/2075; FCA, About T+1 settlement; FCA letter to compliance officers; Federal Register, March 6, 2023; 17 CFR 240.15c6-1; 17 CFR 240.15c6-2. Last updated: October 19, 2026.

From December 7, 2026 the Union message must be electronic, machine-readable and on an international open standard. Annex II says costs "directly associated with the revision of the guidelines are limited" and gives no euro figure. The foreign-exchange side of October 11, 2027 is discussed in Europe's October 2027 T+1 deadline as an FX problem.

"The transition to T+1 is one of the most impactful recent market structure initiatives. It will fundamentally improve the efficiency and international competitiveness of the EU markets. The date is known, the roadmap is clear, and, with the final piece of regulatory guidance published today, the framework is now in place for all players in the trading and settlement chain to prepare for 11 October 2027."

"A successful transition is a shared effort by the industry and the public authorities. The focus now shifts to market participants to comply with the regulatory requirements, ready their systems and processes, and test their preparedness for the change, considering the recommendations of the EU T+1 Industry Committee."

— Verena Ross, chair, European Securities and Markets Authority (ESMA press release, October 16, 2026)

Where a late allocation is, and is not, a sanction

The enforcement fact in ESMA74-2119945926-3749 is a negative one. Clean paragraph 18 says a late or missing allocation has no consequence in CSDR or in Commission Delegated Regulation (EU) 2018/1229. Paragraph 79 says the parties may write a remedy, or not. Within two months of publication in all official languages, each competent authority must tell ESMA whether it complies. Paragraph 13 says firms do not file that return. The report does not restate a cash-penalty tariff at the central securities depository, and none is imported here.

The named fine sits in the United States, and it is not an allocation-format case. On August 20, 2018, InvestmentNews reported that the Financial Industry Regulatory Authority (FINRA) had fined Interactive Brokers LLC $5.5 million for Regulation SHO failures from 2012 through 2015. The firm did not close out more than 2,300 fails to deliver on time, accepted short orders without a borrow about 28,000 times, and permitted more than 4,700 short sales at or below the national best bid. No case number is stated, because the source is that report. ESMA74-2119945926-3749 attaches no tariff to the Level 1 words "allocation" and "confirmation".

What this means for investment firms, clients and compliance teams

For an investment firm, December 7, 2026 is a documentation date and a systems date. Annex IV requires a legally binding agreement on the electronic method and the international open standard. Where two investment firms face each other, paragraph 14 requires them to name the client. From December 2026, paragraph 153 makes the place of settlement (PSET) compulsory in the written allocation. Paragraph 154 refuses a standard for settlement instructions.

Low-volume professional clients may type into a screen if the output is machine-readable. High-volume clients are expected to limit that path. Paragraph 107 gives no exemption and no transaction count. Persons outside MiFID II are outside guideline 1. Fund units stay in guideline 2 even outside the October 11, 2027 Article 5(2) perimeter. Michelle Beck, director of Buy-side, expects UK trade-date allocations by the end of 2026. The FCA letter does not enact Article 2 of the EU RTS.

For a compliance team the work is a gap analysis against Annex IV, not a return to ESMA. Firms do not notify. Competent authorities do, two months after publication in every official language. Guideline 4 allows mail, fax and recorded calls only for a documented temporary disruption. Paragraph 97 strongly recommends that postal mail and fax be the least preferred contingency. Of 17 responses on the oral deletion, 15 agreed. Of 17 on the fallback, 16 supported confining non-machine-readable methods to that disruption.

"The publication of this High-Level Roadmap and the recommendations herein are only one step on the journey to T+1 migration on the agreed date. Further challenging work lies ahead in terms of facilitating adherence with the recommendations, developing more detailed market practices where necessary, supporting the monitoring of implementation and preparing the testing phase."

— Giovanni Sabatini, independent chair, EU T+1 Industry Committee (High-level roadmap, June 30, 2025)

What is still open before December 7, 2026

ESMA has closed the consultation and left a translation. Annex IV still applies the guidelines on December 7, 2026. If translation slips, the two-month notice by competent authorities slips with it. The market date does not. Section 9.3 refuses a delay into 2027 because the RTS applies on December 7, 2026 anyway and Article 6(2) does not authorise a pause. Section 11.3 says further specification "could impose an unnecessary burden to market participants, undermining innovation and the free development of market forces". Paragraph 106 reserves a later look at a named standard.

Footnote 38 says the first Union testing window opens in April 2027, after the allocation rule and before October 11, 2027. The FCA page dates a draft statutory instrument to November 20, 2025 and does not copy the machine-readable definition. The United States compliance date for Rule 15c6-2 is already May 28, 2024. Separate guidelines on delaying inside information, discussed in ESMA's revised guidelines on delaying inside information, do not amend Article 6(2) of CSDR. In ESMA74-2119945926-3749 the standard is mandatory and still unnamed.

TL;DR

Final report ESMA74-2119945926-3749, dated October 16, 2026, revises how an investment firm and a professional client exchange allocations and confirmations. The clean guidelines apply on December 7, 2026, with the amendments Commission Delegated Regulation (EU) 2026/1536 makes to the settlement-discipline standards. The regular method is electronic and machine-readable, and it must use an international open standard as defined in Article 2(1)(34) of Regulation (EU) No 909/2014. ESMA names no protocol, deletes the domestic-standard option, and confines calls, mail and fax to a documented technical disruption. The Union's T+1 date stays October 11, 2027 under Regulation (EU) 2025/2075. The report's readiness figure is that 56% of respondents to the first EU T+1 Industry Committee survey could be late with trade-date allocations by the end of 2026. A late message still has no sanction in CSDR or in the 2018 delegated regulation.

FAQ

What is final report ESMA74-2119945926-3749?

It is ESMA's October 16, 2026 final report on messaging protocols between investment firms and professional clients. The allocation duty is the second subparagraph of Article 6(2) of Regulation (EU) No 909/2014. The guideline mandate is the third subparagraph. The changes align the October 2019 guidelines with Commission Delegated Regulation (EU) 2026/1536. It is guidance under Article 16 of Regulation (EU) No 1095/2010, not the statute that sets T+1.

When do the revised guidelines apply?

Annex IV applies them from December 7, 2026, the day the amendments to Articles 2 and 3 of the settlement-discipline RTS apply. Those amendments are in Commission Delegated Regulation (EU) 2026/1536, published in the Official Journal on October 14, 2026. ESMA rejected a delay to the end of March 2027. One response named March 31, 2027. Translation and the two-month notice do not move that date. The cycle changes on October 11, 2027.

Can a professional client still phone an allocation through?

Not as the regular method. Paragraph 58 removes oral allocations and confirmations. Of 17 responses, 15 agreed. Guideline 4 keeps a recorded call only for a documented temporary disruption, if the recording meets Article 16(7) of MiFID II and Article 76 of Commission Delegated Regulation (EU) 2017/565. Mail and fax can be agreed for that same disruption. Paragraph 97 strongly recommends that postal mail and fax be the least preferred fallback.

Do email and a screen comply?

They can, if the content is structured so software can extract the data. Guideline 3 lists email and a screen as examples. Manual typing is accepted for low-volume clients when the output is machine-readable. High-volume clients are expected to limit that path. Paragraph 19 still requires international open standards under Article 2(1)(34) of Regulation (EU) No 909/2014. A structured email does not answer that second test.

Does December 7, 2026 move the Union to T+1?

No. December 7, 2026 is the application date of these guidelines and of the amended allocation standards. The cycle changes on October 11, 2027 under Regulation (EU) 2025/2075 of October 8, 2025. Guideline 2 keeps a wider list than Article 5(2), including money-market instruments, fund units and emission allowances. The first Union testing window in the report opens in April 2027.

Who is the professional client, and what if the message is late?

Guideline 1 uses the professional client in point (10) of Article 4(1) of MiFID II. Persons exempt under Article 2 are outside. An Annex II, Section I entity stays inside even if treated as an eligible counterparty. If two investment firms trade, they must decide which one is the client. A late message has no sanction in the statute. Clean paragraph 18 says the parties may write a remedy and do not have to.

This article is informational analysis only and does not constitute legal, regulatory, tax, or investment advice. Regulatory frameworks change frequently and interpretation depends on facts and circumstances; primary documents and official regulator guidance always supersede summaries. Firms should consult qualified legal counsel and their relevant supervisory authority before taking any action based on the analysis above.