Sure, here's a simple DECLARE model that reflects the commonalities in all the process variants:

```python
model = {
'existence': {
    'Create Fine': {'support': 1.0, 'confidence': 1.0},
    'Send Fine': {'support': 1.0, 'confidence': 1.0},
    'Insert Fine Notification': {'support': 1.0, 'confidence': 1.0},
    'Add penalty': {'support': 1.0, 'confidence': 1.0},
},
'init': {
    'Create Fine': {'support': 1.0, 'confidence': 1.0},
},
'response': {
    ('Create Fine', 'Send Fine'): {'support': 1.0, 'confidence': 1.0},
    ('Send Fine', 'Insert Fine Notification'): {'support': 1.0, 'confidence': 1.0},
    ('Insert Fine Notification', 'Add penalty'): {'support': 1.0, 'confidence': 1.0},
},
'succession': {
    ('Create Fine', 'Send Fine'): {'support': 1.0, 'confidence': 1.0},
    ('Send Fine', 'Insert Fine Notification'): {'support': 1.0, 'confidence': 1.0},
    ('Insert Fine Notification', 'Add penalty'): {'support': 1.0, 'confidence': 1.0},
},
'chainresponse': {
    ('Create Fine', 'Send Fine'): {'support': 1.0, 'confidence': 1.0},
    ('Send Fine', 'Insert Fine Notification'): {'support': 1.0, 'confidence': 1.0},
    ('Insert Fine Notification', 'Add penalty'): {'support': 1.0, 'confidence': 1.0},
},
'chainsuccession': {
    ('Create Fine', 'Send Fine'): {'support': 1.0, 'confidence': 1.0},
    ('Send Fine', 'Insert Fine Notification'): {'support': 1.0, 'confidence': 1.0},
    ('Insert Fine Notification', 'Add penalty'): {'support': 1.0, 'confidence': 1.0},
},
}
```

Note: The provided model is a very basic one and covers the most common steps identified in your process variants. Depending on your specific requirements, you may want to add additional constraints for other activities observed in your process variants, such as 'Payment', 'Send for Credit Collection', 'Insert Date Appeal to Prefecture', 'Send Appeal to Prefecture', 'Receive Result Appeal from Prefecture', 'Notify Result Appeal to Offender', 'Appeal to Judge', etc. Some activities may also need their frequency and/or ordering of occurrence to be considered in your model rules.