def check_payed(decorated):
    """
    Check only payed services
    """
    def wrapper(data):
        if data['payed']:
            return decorated(data)
    wrapper.__name__ = decorated.__name__
    return wrapper


@check_payed
def some_check(data):
    # ... some checks
    pass

CHECKS = (
    some_check,
)

def check_outgoing_data(records_iterator)
    for record in records_iterator:
        for check in CHECKS:
            try:
                check(record)
            except ValueError, e:
                logging.error("Fail to run %s at %d record: %s" % 
                                (check.__name__, i, e))