Formal/Written English: Verification of Monetary Contribution
My grandmother lives alone in a low-income housing facility for seniors. Every year, I have to notify the apartment's management that I contribute monetarily for her personal expenses (including rent) since she doesn't get any financial assistance from the government.
On the form I'm filling out, one of the questions asks, "how long will payments continue?". If I wanted to say, "as long as she is alive", what are some appropriate short and formal ways to write that?
- until death
Thank you so much!