Japanese phrase
着いたら___してください。 tsu i ta ra ___ shi te ku da sa i
Meaning
Please ___ when you arrive.
When to use it
Requests an action after someone reaches a destination. It is polite and direct, and often appears in plans involving travel or meeting up.
Example dialogue
会場に着いたら連絡してください。 kai jō ni tsu i ta ra ren raku shi te ku da sa i
Please contact me when you get to the venue.
はい、着いたら連絡します。 ha i tsu i ta ra ren raku shi ma su
Sure, I will contact you when I get there.