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Contents

Official guidance
International Exchange of Information Manual

IEIM8000400 · Due Diligence guidance

  • IEIM8000410 · Introduction
  • IEIM8000420 · Who is required to undertake due diligence and reporting obligations
  • IEIM8000430 · The requirement to collect a self-certificate
  • IEIM8000435 · Identifying reportable users and reportable persons
  • IEIM8000440 · Required Content in self-certificates
  • IEIM8000445 · Tax Identification Number (TIN)
  • IEIM8000450 · Validation of self-certificates
  • IEIM8000460 · Change of circumstances
  • IEIM8000470 · Self-certificates – time limits
  • IEIM8000475 · Valid self-certificate not obtained
  • IEIM8000480 · Notification to reportable users and reportable persons
  1. Due Diligence guidance
  2. Self-certificates – time limits

IEIM8000470 | Self-certificates – time limits

From HM Revenue & Customs · International Exchange of Information Manual

A self-certificate must be collected upon the establishment of the relationship between the RCASP and the user. This applies to both individual and entity users. A self-certificate should be obtained before the RCASP effectuates any transactions on behalf of, or for, that user.

For pre-existing users, the RCASP has 12 months after the 31 December 2025 to collect a valid self-certificate. RCASPs should obtain self-certificates before continuing to effectuate transaction for pre-existing users to avoid a penalty position if users do not respond to requests by 31 December 2026.

Example

As at 1 January 2026, a UK RCASP, MemeCoin Ltd, has 1 preexisting user. Memecoin Ltd has until 31 December 2026 to obtain a valid self-certificate from the user.

On 21 March 2026 MemeCoin Ltd has a new user. MemeCoin Ltd must obtain a self-certificate from the new user at the beginning of the relationship and before any transactions are made by the user.

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