Why do delivery platforms deactivate accounts?

The common ones are dull and administrative rather than dramatic.

• An expired document. Insurance, licence, MOT or right to work. This is the single most common cause and the easiest to fix.
• A failed or lapsed background check.
• Customer complaints, particularly about missing items or behaviour.
• Fraud detection, which is often automated and often wrong. Unusual patterns, a shared device or an account accessed from an unexpected place can all trigger it.
• A run of cancellations, rejections or late deliveries against whatever threshold the platform applies.

Automated systems make the first decision on most of these, which is why an appeal that gets a human reading it often goes differently.

Keep your own records regardless of what any platform holds. If your account goes and the app stops opening, your earnings history goes with it, and you still have a tax return to file.