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Learn what a deposit voucher is, how to prepare a container for return, and how Kaucio helps keep the paper printout's details on your iPhone.
What is a deposit voucher?
A deposit voucher is a paper printout that a shop or return machine may issue after accepting containers bearing the deposit mark. It confirms the refund amount and lets you collect the deposit at a checkout or another designated point. Keep the original until it has been redeemed.
How much is the deposit on a bottle or can?
The deposit is PLN 0.50 for a single-use plastic beverage bottle up to 3 litres, including a typical PET bottle, and PLN 0.50 for a metal can up to 1 litre. The deposit on a reusable glass bottle up to 1.5 litres is PLN 1.00. You will find the amount on the label next to the deposit mark.
How can I recognise a container covered by the system?
The label must show the official deposit-return mark and an amount of PLN 0.50 or PLN 1.00. The system covers marked plastic beverage bottles up to 3 litres, metal cans up to 1 litre, and reusable glass bottles up to 1.5 litres. The material or shape alone is not enough.
Do I need a receipt, and where can I return a container?
You do not need a receipt. You can return a container at a collection point that accepts that type of packaging. These include shops larger than 200 square metres, participating smaller shops, return machines, and other marked collection points. You do not need to return to the place of purchase.
How should I prepare a container for return?
Empty the container, but do not crush it. Keep the label, a readable barcode, and the cap if the container has one. You do not need to wash it.
How long is a deposit voucher valid?
The regulations do not set one validity period for all vouchers. Poland's Ministry of Climate and Environment indicates that a voucher should be valid for at least one month. Always check the date and instructions on the printout, and keep the paper original until it has been redeemed.
What is Kaucio?
Kaucio is an iPhone app that helps you photograph a paper voucher, check and save its details, keep track of its expiry date, and return to the saved code.
How does voucher scanning work?
Take a photo of the voucher and accept or adjust the suggested crop. Kaucio attempts to recognise text and a barcode or QR code on the device. Before saving, you can correct the collection point name, address, amount, voucher number, code value, and dates.
Do I need an internet connection or an account?
The app does not require an account for its core work with saved vouchers. The current version processes scans and stores them locally on the device.
Will a collection point accept the code from my screen?
Kaucio creates a code view from the value saved from the voucher and can increase screen brightness, but the redemption point decides whether to accept it. Keep the paper voucher until you have collected the deposit.
When will Kaucio be available on the App Store?
The app is in development. A direct App Store link will appear on this website after release.
Information was reviewed on 17 July 2026 using materials from Poland's Ministry of Climate and Environment: deposit-return system and deposit voucher rules.
Direct email support
Write directly to the creator of Kaucio.
Describe the issue and include your iPhone model, iOS version, and Kaucio version. Do not send a voucher photo or code value unless it is necessary to resolve the issue.