here are a few more that may work for you, all posted here before on cheapies i believe so credit to the OP's, hopefully they work for you if you haven't entered them before.
worked with new account for me.
More Free Hot Drinks @ Z App
Last edited 26/06/2022 - 08:50 by 1 other user
Z Energy Referrals
Referrer gets 1 free coffee (up to 3 max). Referrer requires referee's phone number.
Referee gets 50L+ extra 25L. Referrer gets 50L. Referral code needs to be entered during account creation in the "Promo" section.
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ah sorry i have removed, still some people may of missed, all the other codes were either posted last year or made in a comment so might help highlight them to those that may not know
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Agreed. There have been a lot. All good mate.
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All worked, surprisingly.
Edit: Vouchers aren't actually showing up.- 1

Tried two of the codes, both went through but I did not get the vouchers.
My account already had 9 free drinks so if you're in a similar situation, you might not want to use these yet and actually redeem 3 drinks first before using these codes. There may be a cap of 9 free drinks.
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The free drink 9 gone I think Z fix the glitch now my drink down to 2 :(
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Oh shi* you right! I just checked and lost 3 free drinks!
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same here
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Applied but doesn't show up
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Just wondering how many pre-existing free drink vouchers you were sitting on?
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I was at 3.
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Thanks for the input! So it probably has nothing to with do # of drinks. Vouchers are simply not showing up.
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Same here, all accepted but none showing up
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Safe to say the system is glitchy af so wouldn’t be surprised if accepted but doesn’t show up. 😂
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all worked none showed up though
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None worked for me
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Last one worked for me but voucher not showing up
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Two accepted but no additional voucher. Still just have four drinks from thank you codes
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Can you get this if you don't have a car?
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yes you can just go into the store and pick up the coffees
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Has anyone been able to redeem more than 3 codes in 1 day? I could add 3 yesterday and 3 today before error messages come up
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Redeeming 5 right now. Had to be in 5 separate sales otherwise the app would error.
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on mine it said free with any purchase?
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I think z's app developer might be in trouble 😵💫
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They should've been in trouble anyway because the app is a dog
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Seems like they caught up with it. Additional codes doesn't work
Can anyone confirm it works if you are loading from scratch?- 1

Seems to be limited to 3per day
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i didn't have any code before, none of them worked, they may have shut down the redeem process.
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None worked for me.
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My daughter tried to redeem all codes yesterday and ZERO worked so I think they have fixed it. Snooze ya lose.
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Does not work since last night as reported by fellow members. Codes were up almost two days. Gotta be quick around here.
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Yup none of those work.
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Didn't work for me, hopefully works for others