Who pays plumber if water comes in through kitchen sink in condo unit in Arizona. The association or tenant if water never originated in that unit.

Yours is not a plumbing question and it is also unanswerable in such cryptic form.

Water could never originate inside a condo unit unless you can figure out some way to make it rain in a condo unit.

Please restate your problem in the context of what occurred.

I will assume you mean a drain backup. Read your condo association rules and regulations . They vary by location, state and even condo.