Sample:
[YOUR ADDRESS & TELEPHONE NUMBERS HERE]
[Date] 2010
Dear [au pair name],
We are very much looking forward to welcoming you in to our family for the next year, as an aupair.
We will pick you up from [NAME] Airport on [DATE] at [TIME]. We will be in the arrivals hall and will have a sign with your name on it.
Have a good flight.
We look forward to meeting you shortly.
Best wishes
To Whom it may concern
If you have any queries about [AU PAIR NAME] entering the country, please call us on the phone number above.
[AU PAIR NAME] is coming to to work as an au pair. She will stay with our family for one year. During her stay, she will be paid [ ] per week as well as board and lodgings.