Recovering a phone when an instalment customer stops paying

ABMDM Editorial Team. Published: 02/11/2026.

How should a shop recover a phone when the customer stops paying?

Work in order: remind within reasonable hours, renegotiate in writing, use tiered locks as a support tool, and only then involve the competent authority if the customer will not cooperate. Do not seize the phone yourself, do not threaten the customer, and do not hold anyone else's property in their place.

This article is about an instalment sale between a shop and a customer. It differs from reclaiming a phone when staff leave. Staff return phones under an employment contract; an instalment customer is a buyer, and the answer lives in the sale contract. The article describes the general process only. It does not replace a lawyer drafting your contract or advising on a specific case.

What the contract needs before you ever have to recover a phone

Most recovery trouble starts with a thin contract. For sales paid late or in instalments, under the 2015 Civil Code the seller can keep ownership until the buyer has paid in full, if both sides agree to that; check the official text. For reference, see the Civil Code 2015 (Vietnamese). The ownership model is covered in selling iPhones on instalments with MDM.

The contract should state:

• Serial number, model, price, number of payments and due dates.
• That the shop keeps ownership until paid in full.
• That the customer agrees to the shop managing the device and sending reminders when overdue.
• What happens when payments are late: extension, voluntary return, and how money already paid is treated.
• Address, phone number and how written notices are delivered.

Do not copy clauses from another shop. Have a lawyer review your template once.

Step 1: remind at the right time, the right person

Remind only the person named on the contract, within ABMDM's reminder window (7am to 9pm, which is ABMDM's overdue-reminder setting, not a legal rule; see the device financing page), and log every reminder: date, time, channel, content. Do not call relatives, colleagues or the landlord. Do not post the customer's name in group chats or on social media.

Keep messages short: how many payments are overdue, the amount due, the shop phone number and how to transfer. No threatening wording.

Step 2: agree a way forward and put it in writing

Many customers stop paying because of a temporary hardship, not because they want to cheat you. Invite them to talk in person or by phone. Three common outcomes:

1. Extend or re-split the remaining payments.
2. The customer returns the phone voluntarily.
3. The customer pays part and both sides settle the rest.

Whichever you choose, write it down and have both sides sign: amount paid, amount still owed, the route chosen. If the customer returns the phone, add a handover record with serial number, condition, date and time, and who handed over and received. Late-payment interest is charged only if the contract states it and the law allows it; for penalty fees, ask a lawyer before applying a specific amount.

Is a tiered lock a way to recover the phone?

No. A tiered lock is a stronger reminder until the customer gets in touch, not a way to take the device. The customer can still call, still has a way to pay on the screen, and the phone unlocks when they pay. Details are in tiered locks for overdue instalments and on the device financing page.

A few boundaries:

• Lock only devices under a contract that is not yet settled, by an account with permission, with a log.
• The lock-screen message is payment information, not a threat.
• Do not wipe a phone because of a few days' delay; a wipe is a different command.
• Do not read messages, photos or passwords. ABMDM cannot read them either.
• Personal Data Protection Law 91/2025/QH15 classes location data as sensitive data (see the Government portal, in Vietnamese). View it only if the contract allows, log each look, and never use it to turn up at the customer's home and pressure them.

What if the customer still does not cooperate?

Send a written notice to the address in the contract, stating the debt and the deadline, and keep proof it was sent. After that, depending on the case, ask a lawyer whether to seek mediation or file a claim with the competent court. Civil claims have a limitation period, so ask a lawyer and do not let the file sit.

If the customer sells the phone on, changes details to avoid you, or there are signs of fraud, speak to a lawyer (depending on the case, ask a lawyer) before working with the competent police authority. Whether it is a civil dispute or has criminal elements is for the competent authority to decide, not the shop.

Keep the file tidy: contract, payment schedule, reminder log, signed agreement, lock and unlock log.

Situation	Do	Do not
Customer a few payments late	Remind within ABMDM's reminder window, invite a talk, use tiered locks	Wipe the phone, call relatives
Customer wants to return the phone	Handover record with serial and amount	Take it with no paperwork
Customer goes silent	Written notice, ask a lawyer about mediation or court	Go to their home and take it, threaten
Wanting to see data	Do not read the phone's content	Read messages, photos, passwords

After you have the phone back

Check the serial against the contract and photograph the condition at handover. The customer wipes their own personal data, or agrees in writing for the shop to do it. If the phone is in ABMDM, a person with permission gets the iCloud unlock code from the dashboard; never ask anyone to bypass a lock.

Reconcile what was paid against what was owed under the signed paper, then close the contract. A phone you pass to another customer must be wiped and checked again before sale.