Custodian Migration

Overview

What it means and why it matters

Custodian migration is the controlled transfer of safeguarded assets and related records from one custody provider to another. It involves operational, contractual and reconciliation work beyond moving coins.

How it works in practice

The business approves a migration plan, validates asset support and recipient addresses at the new custodian, performs small verification transfers if appropriate, then moves assets in monitored batches. It reconciles balances, fees, unsettled transactions and customer entitlements before retiring old access.

Technical detail without the jargon

Plan for asset/network compatibility, withdrawal limits, pending staking or contract positions, tax and reporting history, and legal segregation. Maintain continuity of deposits arriving at old addresses until all customers and integrations have transitioned.

A deeper point to understand

Customer communications form part of safe migration. An unexpected address change can look like phishing, while failing to update payment instructions sends deposits to legacy destinations. Announce verified channels in advance and continue observing both destination sets until the transition is proven complete.

Common mistakes and limitations

Do not assume all assets can be moved immediately: some tokens are frozen, unsupported or tied to provider-specific services. A migration is not complete until the new custodian’s balance and the old custodian’s residual exposure are reconciled.

What to check in a real payment system

Before transferring significant balances, verify destination networks and addresses using separately approved instructions. Reconcile the old and new custody reports after each tranche. Keep old deposit monitoring active and account for unsettled withdrawals until all residual positions are closed.

Related concepts

Crypto Wallet, Private Key, Seed Phrase.

Further reading

Bitcoin Developer Guide — Wallets.