Rewrite this message to sound {{TONE: e.g. firmer but polite / warmer / more formal / more casual}}.

Context: it is for {{WHO: e.g. a client who pays late / my manager / a new teammate}}.

Keep the same requests and facts. Change only wording, order and length. Give me two versions: one close to the original length and one shorter.

Message:
"""
{{MESSAGE}}
"""