Warranty Policy

This policy explains how Công ty TNHH Sơn DOSA receives and handles warranty requests for products, components and technical service work. Specific conditions are determined according to the actual product and the relevant transaction records.

Last updated: July 24, 2026.

Warranty Basis and Scope

The warranty period, scope and form of remedy are stated in the quotation, invoice, delivery note, acceptance record or separate confirmation for each case. General information on the website does not replace terms confirmed by both parties.

The warranty start date is based on the date stated in the relevant records, which may be the delivery date, acceptance date or service completion date.

Cases Considered Under Warranty

• The product shows signs of a fault within the confirmed scope and applicable period.
• The product retains the identification information, label or other details DOSA needs for verification.
• The equipment was installed, operated and stored in accordance with the instructions or agreed conditions.
• The customer provides information about the current condition and cooperates with the inspection when requested.

Cases Outside the Warranty Scope

• Damage caused by incorrect installation or operation, an unsuitable power supply, impact, chemicals, heat, moisture or external environmental conditions.
• The product has been dismantled, repaired, reconfigured or otherwise altered by another party without confirmation from DOSA.
• Normal wear, consumables or parts with a replacement cycle are not covered unless they were specifically confirmed as warranty items.
• There is insufficient information to identify the product, transaction, relevant date or original condition.

Information to Prepare

• Product name, code or any available identification information.
• Quotation, delivery note, invoice or related acceptance record, if available.
• A description of the issue, when it occurred and the operating conditions.
• Photographs of the complete item, label, installation position and area showing signs of an issue.

Receiving and Inspection Process

1. DOSA receives the information and checks the warranty basis for the product or work item.
2. The parties agree on a remote inspection, product return or on-site assessment when necessary.
3. DOSA assesses the condition and reports the result, scope of work and estimated completion time.
4. Based on the inspection result, the product or work item is repaired, replaced or transferred to a separately quoted service.

Costs and Transportation

Inspection, shipping, travel or work outside the warranty scope will be quoted before it is carried out. Responsibility for costs in a warranty case is determined according to the confirmed conditions and the actual cause.

Support After the Warranty Period

After the warranty period has expired, or when a case is outside the warranty scope, DOSA may still receive requests for inspection, repair or replacement when support is available. The scope and cost will be quoted separately; accepting a request does not guarantee that the equipment can be restored.

Contact and Returns

Customers can submit details of the current condition through the Contact page. If the issue concerns an incorrect or incomplete delivery, or a return request rather than a fault arising during use, please review the Returns and Refunds Policy.