Linking External Accounts

Link Bank Account via Micro Deposit

1. Show account linking Disclosure

2. Collect Account and Routing Number

3. Create ACH-US Node

4. Wait for the user to be approved SEND-AND-RECEIVE

5. Notify the User of Incoming Micro Deposits

6. Send Micro Deposits

7. Collect Micro Deposit Numbers

8. Validate ACH-US Node

Notes:

• Linking accounts via micro deposits is subject to fees in order to support the cost of sending the transactions

• Fraud rings have started farming micro deposits using automation which can lead to huge losses if not managed properly.

Link Bank Account via Account Aggregator

1. Show account linking Disclosure

2. Display account aggregator window

3. Collect username/password via aggregator

4. Collect Account details from aggregator

5. Create ACH-US Node

Notes:

• Prerequisite: Integrate with an account aggregator like Plaid or MX

• Include account details and 3 months of account history when creating the node

Link a Card

1. Collect Card details from User

   1. Card Number

   2. Expiration

   3. CVV

   4. Payment Address

2. Encrypt Card on the user’s device details with Synapse public key

3. Create INTERCHANGE-US Node

Notes:

• Platforms will be required to maintain PCI Compliance and pay for regular audits if unencrypted card details hit their servers at any time

• Invalid Card Details will result in a 400 response code

• In order to reduce fraud, platforms can elect to enforce restrictive AVS requirements when creating the node