Leer Validating Regulatory Requirements | Automating Compliance Checks

Python for Compliance Officers

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Regulatory requirements in financial compliance often take the form of explicit rules, such as daily transaction limits, restrictions on dealing with certain countries, or prohibitions against transacting with blacklisted entities. These requirements are designed to prevent money laundering, fraud, and dealings with sanctioned individuals or organizations. As a compliance officer, you can use Python to automate the validation of these rules by encoding them as logic that systematically checks your transaction data. For example, you might need to ensure that no transaction is processed if it involves an entity on a government-issued blacklist. This approach not only increases efficiency but also reduces the risk of human error in regulatory checks.


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def is_transaction_blacklisted(transaction, blacklist):
    """
    Checks if either the sender or receiver in a transaction is on the blacklist.
    Returns True if a violation is found, False otherwise.
    """
    return transaction["sender"] in blacklist or transaction["receiver"] in blacklist

This function works by taking a single transaction and a list of blacklisted entities. It checks if either the sender or receiver in the transaction matches an entry in the blacklist. If there is a match, the function returns True, indicating a violation of the compliance rule. By hardcoding the blacklist as a Python list, you can quickly compare transaction data to known prohibited entities and flag any issues for further review. This kind of logic forms the foundation of automated compliance checks, ensuring that your systems can reliably enforce regulatory requirements.


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# Sample blacklist and transactions
blacklist = ["EntityA", "EntityB", "EntityC"]

transactions = [
    {"sender": "EntityX", "receiver": "EntityY", "amount": 1000},
    {"sender": "EntityA", "receiver": "EntityZ", "amount": 500},
    {"sender": "EntityY", "receiver": "EntityB", "amount": 750},
    {"sender": "EntityD", "receiver": "EntityE", "amount": 200}
]

# Check each transaction and print violations
for tx in transactions:
    if is_transaction_blacklisted(tx, blacklist):
        print(f"Violation: Transaction involves blacklisted entity - {tx}")

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Validating Regulatory Requirements

1. What is a blacklist in the context of compliance?

2. How can Python help enforce regulatory requirements?

3. What happens if a transaction matches a blacklisted entity?