Quick answer
A seller generally cannot change an agreed price or remove an agreed inclusion without your consent once a binding contract exists. Philippine law also prohibits selling a retail consumer product above its displayed price. However, an advertisement, preliminary quotation, or automated order acknowledgment does not always establish a completed agreement. The actual offer, acceptance, conditions, and transaction records matter. Supreme Court E-Library
Start by preserving the original price and terms. Ask the seller to explain the change in writing and request the appropriate remedy: honoring the agreement, returning an overcharge, or refunding payments where cancellation is legally justified. For covered online purchases, use the platform’s or e-retailer’s internal complaint mechanism before escalating.
First, identify what the seller is changing
An agreement you already accepted
Under Civil Code Article 1475, a sale is generally perfected when buyer and seller agree on the particular item and its price. Full payment and delivery are not ordinarily prerequisites to that agreement.
In ACE Foods, Inc. v. Micro Pacific Technologies Co., Ltd., G.R. No. 200602, December 11, 2013, the Supreme Court recognized a sale upon acceptance of the seller’s proposal through a purchase order. It also rejected a later unilateral stipulation that had not been shown to modify the original agreement. The practical point is that later paperwork does not automatically rewrite previously accepted terms. lawphil.net
Check the documents for:
The exact item, model, quantity, or service scope.
The total price and payment schedule.
Delivery, installation, accessories, and other inclusions.
Any approval requirement, expiry date, or price-adjustment condition.
The seller’s acceptance and the authority of the person who gave it.
A valid, agreed adjustment mechanism may affect what is payable. But a blanket statement that the seller can change anything at any time raises a different issue: Civil Code Article 1308 requires mutuality. In GF Equity, Inc. v. Valenzona, the Supreme Court explained that contractual fulfillment cannot depend exclusively on one party’s uncontrolled will. Supreme Court E-Library
An advertisement or quotation that has not become a contract
Under Article 1325, business advertisements are generally invitations for customers to make offers, unless the advertisement indicates otherwise. A quotation’s wording likewise matters: a definite offer differs from an estimate subject to inspection or approval.
Before acceptance, withdrawal may be possible under Article 1324, subject to its rules on communication and an option supported by separate consideration. These principles do not excuse misleading advertising or violations of retail price-display requirements. Supreme Court E-Library
Preserve the terms that existed when you ordered. A current webpage may no longer show the conditions relevant to your transaction.
When the checkout price is higher than the displayed price
Article 81 of the Consumer Act, Republic Act No. 7394, prohibits selling a retail consumer product above its displayed price.
First confirm that the label matches the item’s barcode, size, variant, and quantity. Photograph both the product and the corresponding price display before requesting a correction. issuances-library.senate.gov.ph
DTI Administrative Order No. 3, series of 1991, specifically provides that when two or more prices are inadvertently attached to an identical product, the lower price prevails. It also provides for reimbursement upon demand within 24 hours from purchase if the customer paid the higher price despite that rule. Raise the discrepancy immediately. That provision should not be confused with a universal 24-hour deadline for every consumer complaint. Supreme Court E-Library
A price discrepancy and a claim to compel delivery of a particular item can involve different legal questions. If the store refuses the transaction altogether, document its explanation and ask DTI to assess the conduct.
When a discount, freebie, or promotional offer disappears
Read the complete mechanics, including eligibility, dates, participating branches, minimum spend, stock limits, and required payment method. Keep evidence that you met the applicable conditions.
A seller may face a deceptive-sales complaint if it falsely represents a price advantage or promised benefit to induce a purchase. Article 50 covers deceptive conduct before, during, or after a consumer transaction. Whether a particular promotion violates the law depends on the representation and evidence. lawphil.net
For sales promotions subject to DTI regulation, the agency’s guidance requires its knowledge and approval for changes to mechanics, duration, qualifications, and other specified terms. Changes must also be announced at least twice before taking effect, through the same manner and medium used for the promotion. Ask for the original mechanics and any approved amendment. Fair Trade Enforcement Bureau
What if the seller says the price was a mistake?
“Pricing error” is not a complete explanation by itself. Ask what was wrong, when it was discovered, and which transaction term the seller relies on.
A material mistake affecting consent can matter legally. In Cebu Winland Development Corporation v. Ong Siao Hua, the Supreme Court explained that a mistake must go to the essence of the contract to invalidate consent. Whether that standard is met requires examination of the circumstances. Supreme Court E-Library
For an online order, preserve the listing, checkout screen, confirmation, payment record, and cancellation notice. These help distinguish:
A listing that had not yet been accepted.
An order acknowledgment still subject to a disclosed acceptance process.
An accepted agreement followed by an attempted price increase.
Do not assume either that every displayed mistake must be honored or that labeling it an error automatically defeats your rights. Applicable price-display rules must also be considered.
Additional protections for online purchases
Republic Act No. 11967, the Internet Transactions Act, requires covered online merchants and e-retailers to display prices consistently with Article 81. It also requires conformity with relevant descriptions and advertised inclusions, and performance of services according to the contract and advertisement. lawphil.net
An agreement made through chat or email is not invalid merely because it is electronic. Section 16 of Republic Act No. 8792 recognizes electronic messages and documents as means of forming and proving contracts. Preserve the full conversation and original records, not just isolated screenshots. Supreme Court E-Library
The Internet Transactions Act excludes genuine consumer-to-consumer transactions outside the ordinary course of business. Buying a used personal item from another individual may therefore require a different analysis, although ordinary contract law can still apply. lawphil.net
What remedies can you seek?
The appropriate remedy depends on the agreement, breach, evidence, and forum.
What happenedRemedy to consider requestingThe seller demands more for an accepted orderPerformance at the agreed priceYou paid above the applicable displayed priceReimbursement of the overchargeAn agreed inclusion was removedDelivery of that inclusion or a mutually agreed adjustmentThe seller refuses a substantial part of its obligationsCancellation or resolution of the contract and return of payments, where legally justifiedThe breach caused additional lossesLegal assessment of a properly supported damages claim
Civil Code Article 1191 permits fulfillment or resolution for qualifying breaches of reciprocal obligations. Resolution generally requires a substantial breach and entails returning benefits received. A refund is therefore not an automatic entitlement for every minor disagreement, nor does it normally allow a buyer to retain goods that must be returned. lawphil.net
DTI’s ordinary consumer adjudication guidance distinguishes repair, replacement, or refund from damages and litigation expenses. The Internet Transactions Act’s implementing rules likewise distinguish court claims for damages from DTI proceedings for administrative penalties. Do not assume an administrative fine will be paid to you as compensation. Fair Trade Enforcement Bureau
Practical steps to protect your claim
1. Preserve the transaction before anything changes
Save:
The advertisement, price tag, quotation, and complete promotional mechanics.
The seller’s business name, address, account name, and listing URL.
Order numbers, invoices, receipts, and payment confirmations.
Complete chats and emails showing acceptance and subsequent changes.
Delivery records and photographs of missing or substituted inclusions.
Complaint tickets, responses, and the dates you received them.
Receipts for additional expenses you may later need to substantiate.
Keep original files and uncropped copies. Make a dated chronology explaining what was offered, accepted, paid, changed, and requested.
2. Send a clear written demand
Identify the transaction, original terms, later change, and remedy you seek. Attach the strongest supporting records and request a written response.
You can state:
I dispute the additional charge/change to order [number]. The attached records show the agreed price and inclusions. Please confirm whether you will fulfill those terms and explain the basis for the proposed change. My requested resolution is [specific remedy].
Avoid signing a revised agreement or full-settlement release until you understand its effect. If the seller proposes a refund, clarify the amount, method, timing, and any return arrangements.
3. Use the required online complaint mechanism
For transactions covered by the Internet Transactions Act, Section 24 requires use of the digital platform’s, marketplace’s, or e-retailer’s internal redress mechanism before filing with a court or government agency, or resorting to alternative dispute resolution.
The mechanism is deemed exhausted if the complaint remains unresolved seven calendar days after filing. Save proof of submission. This is an escalation rule, not a universal seven-day refund guarantee. Supreme Court E-Library
4. Escalate through the appropriate channel
For ordinary retail consumer disputes within DTI’s jurisdiction, use the DTI Consumer CARe portal or email consumercare@dti.gov.ph. DTI also accepts complaints through its offices; consumers outside Metro Manila may approach the relevant regional or provincial office. Fair Trade Enforcement Bureau
DTI’s complaint guidance calls for the parties’ identifying and contact details, a narration of facts, your demand, transaction evidence, and a government-issued ID. Submit identification through official channels rather than posting it publicly. e-Share Information, Gain Awareness
DTI mediation seeks a settlement. If it fails, obtain the Certificate to File Action and follow the requirements for a formal complaint. Adjudication requires additional documents, including a verified complaint, supporting evidence, and certification against forum shopping. An initial assistance request is not necessarily the completed formal case. Fair Trade Enforcement Bureau
For banking, insurance, telecommunications, transport, property, or other specially regulated transactions, confirm the correct agency or tribunal before filing.
When a court claim may be appropriate
A qualifying demand for money owed under a sale of personal property or a service contract may fall under small claims if it does not exceed ₱1,000,000. A request to compel delivery or decide other nonmonetary relief is different; the amount alone does not make every dispute a small claim. Consult the Supreme Court’s small-claims rules and forms. Supreme Court of the Philippines
Get advice on the correct defendant, venue, any required barangay conciliation, and coordination with an existing DTI case. Avoid filing overlapping proceedings without understanding the applicable rules.
Deadlines and situations requiring urgent help
Consumer Act claims generally prescribe within two years from consummation of the transaction or commission of the deceptive, unfair, or unconscionable practice; hidden defects have a discovery-based rule. lawphil.net
The Internet Transactions Act also provides a two-year period from accrual of the cause of action for its damages provision. Other legal claims may have different periods. Do not assume that informal negotiations suspend a filing deadline. lawphil.net
Seek prompt assistance when a filing deadline is close, a substantial deposit is at risk, the seller threatens forfeiture, delivery is essential for an imminent event, or documents contain a release or waiver you do not understand. If fraud or an unauthorized payment is suspected, contact the payment provider promptly about its dispute process and preserve the evidence.
Common mistakes to avoid
Keeping only the receipt. It may not show promised inclusions or the original advertisement.
Recording the dispute as buyer’s remorse. Explain accurately if the seller changed the terms.
Canceling through the wrong platform option. Preserve the seller’s refusal before selecting a reason that could misdescribe what happened.
Accepting store credit without checking its conditions. Confirm whether accepting it settles the dispute.
Relying on verbal assurances. Ask for the revised proposal or refusal in writing.
Waiting through repeated promises. Track platform deadlines, agency notices, and legal limitation periods.
Frequently asked questions
Does paying a deposit guarantee that the original price is binding?
Not by itself. A deposit is evidence, but its meaning depends on the reservation terms, acceptance, and agreed conditions. Preserve the document explaining what the payment secured.
Can the seller rely on “prices subject to change without notice”?
That wording must be assessed against the agreement and mandatory law. It does not automatically establish a right to rewrite an accepted contract. Supreme Court E-Library
Can I demand a refund simply because I changed my mind?
There is no general change-of-mind refund entitlement under DTI’s ordinary defective-product guidance. A seller’s voluntary policy may offer more. A seller’s failure to honor agreed terms presents a different issue. Fair Trade Enforcement Bureau
Is an automatic refund always enough to resolve the seller’s breach?
Do not assume so. Whether other relief remains available depends on the contract, reason for cancellation, applicable law, and any settlement you accepted. Obtain advice before signing a release if you intend to pursue further relief.
This article provides general Philippine legal information, not advice on a particular dispute. Rights and remedies depend on the transaction records and applicable law. Sources checked on October 16, 2026.
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