(Any of the 4 formats below will probably get to Deborah just fine. But we all had an opinion about what is best.)

The GLR SO Meetup Reimbursement Form lists the address of:

Waze Mobile Ltd. (deblaks)
Electra Tower, 98 Yigal Alon Street,
Tel Aviv 6789141
c/o Google Israel

After a bit of discussion in the GLR 2017 Meetup (2017-08-26, Indy) GHO,

TerryPurdue suggests:

deblaks
Google Israel
Yigal Alon St 98
6789141 Tel Aviv
Israel

OhioStMusicMan suggests:

Waze Mobile Ltd
C/O Google Israel
Attn: deblaks
Yigal Alon St 98
6789141 Tel Aviv
Israel

I would suggest:

Waze Mobile Ltd. (deblaks)
c/o Google Israel
Electra Tower, 98 Yigal Alon Street
Tel Aviv 6789141
ISRAEL

(USPS wants county in last line and they prefer capital letters. Once the USPS gets it going to Israel, I don't think their formatting rules are relevant, so I'll defer to an Israeli resident, except for the placement of c/o line.)

(Item of interest: deblaks is the user name for Deborah Laks Du Bois, a Waze employee.)