[relax88]

A vast system of fraud detection and limits on what can be done to accounts, especially on a mobile app.

If you try and move large amounts of money via your mobile banking app you won’t get very far before you have to show up in person at a branch.

[TekMol]

Is that true? What would be maximum amount someone can transfer from their bank account in a given day via the banking app / website?

[relax88]

Depends on the bank, account type, and the destination for the funds.

My bank requires in-person to send a wire transfer, meaning in person identification at a bank branch with photo ID and PIN.

You can only transfer money on the app within your own accounts or to payees that are in the system (e.g your utility company, insurance company, etc.) or by using interac e-transfers with a limit of ~$1500.

Even if you’re trying to pay your taxes to the Canada Revenue Agency the bill payment system has a limit that I have hit. You can bet that a review process is triggered when that happens as well.

Any deposit of >$10000 from a wire transfer usually triggers a phone call as well where someone will politely ask you if you were expecting the transfer.

[Causality1]

As an example, someone once had to write me a check for $10,000. The bank transferred the amount incrementally to give the originator time to object. The first day it transferred $100, then $200, $500, $1000, $3000 and so on until the full amount had been paid.

[syntheticnature]

This page has further examples that appear to vary for ACH transactions (one of the more common means for app/website transfers), indicating that for would-be thieves it would be a guessing game, and the limits are generally pretty low: https://www.mybanktracker.com/news/ach-transfer-limits

[pjc50]

My bank says the faster payment limit is £25k. They do require phone code confirmation, but that can be hacked.