Last Updated: August 18, 2026

At Mac Peptide, we aim to provide a clear and responsible purchasing experience for customers ordering laboratory research materials, research compounds, and related laboratory accessories.

Because many of our products require controlled handling, appropriate storage, and maintained package integrity, returns are subject to specific conditions. Please review this policy carefully before placing an order.

1. General Return Policy

Because of the nature of laboratory research materials, many products sold by Mac Peptide are not eligible for return once shipped.

This policy helps protect product integrity, documentation accuracy, batch traceability, and appropriate handling standards.

Products that have left our controlled fulfillment process cannot generally be returned for resale because we cannot independently verify how they were stored, handled, or maintained after delivery.

Exceptions may apply when an order arrives:

• Damaged during shipment
• With an incorrect product
• With a verified missing item
• With compromised packaging
• With another confirmed fulfillment error attributable to Mac Peptide

All requests are reviewed individually.

2. Research Materials Are Generally Non-Returnable

For quality-control and product-integrity reasons, research peptides, research compounds, prepared laboratory solutions, and other sensitive laboratory materials are generally final sale once shipped.

We cannot accept returns simply because:

• The customer changed their mind
• The product is no longer required
• An incorrect product was ordered by the customer
• The customer selected the wrong quantity
• Research plans changed
• The material was stored improperly after delivery
• The product was opened or handled
• The package was delivered successfully but later became compromised

Customers are responsible for reviewing product names, quantities, specifications, and research requirements before completing checkout.

3. Damaged Products

If your order arrives visibly damaged, contact Mac Peptide as soon as possible after delivery.

Please provide:

• Your order number
• Name associated with the order
• Description of the issue
• Clear photographs of the product
• Photographs of the shipping package
• Photographs showing any visible damage
• Any other information reasonably requested by our support team

Do not discard damaged packaging or products until your claim has been reviewed.

If we approve the claim, Mac Peptide may provide an appropriate replacement, refund, or other resolution depending on the circumstances.

4. Incorrect Products

If you receive a product different from the item listed on your confirmed order, contact our support team promptly.

Please include:

• Order number
• Product ordered
• Product received
• Clear photograph of the received product
• Photograph showing the product label
• Photograph of relevant packaging where requested

Once we verify the error, Mac Peptide will determine the appropriate resolution.

5. Missing Items

If an item is missing from your shipment, please review:

• Your order confirmation
• Packing materials
• All contents of the shipment
• Any separate shipment notifications

Some orders may be divided into multiple packages.

If an item remains missing, contact Mac Peptide with your order number and details of the missing product.

Verified fulfillment errors may qualify for replacement, refund, store credit, or another appropriate resolution.

6. Compromised Packaging

Do not use or further handle a product if its primary packaging, seal, vial, container, or other protective closure appears visibly damaged or compromised upon arrival.

Contact our support team with photos and order information so we can evaluate the issue.

We review packaging-damage claims based on available evidence and shipping circumstances.

7. Order Cancellations

Customers may request cancellation before an order enters fulfillment.

We will make reasonable efforts to accommodate cancellation requests, but cancellation cannot be guaranteed after an order has:

• Entered processing
• Been packed
• Received a shipping label
• Been transferred to a carrier
• Otherwise progressed beyond the cancellation stage

If an order has already shipped, the restrictions described in this Refund & Returns Policy will apply.

8. Refund Eligibility

A refund may be considered when:

• Mac Peptide confirms an eligible fulfillment error
• A product is damaged during shipping and replacement is not appropriate
• An approved order cancellation occurs before shipment
• An item cannot be fulfilled after payment has been completed
• Another circumstance qualifies under applicable consumer law

Claim approval does not automatically mean a cash refund will be issued. Depending on the circumstances, an appropriate resolution may include:

• Replacement
• Refund
• Partial refund
• Store credit

The available remedy may depend on applicable law and the specific circumstances of the order.

9. Refund Processing

Approved refunds will generally be issued to the original payment method where reasonably possible.

After a refund is processed by Mac Peptide, additional processing time may be required by:

• Banks
• Card issuers
• Payment processors
• Other financial institutions

Mac Peptide does not control third-party banking or payment-processing timelines.

Original shipping charges may be non-refundable unless the refund results from an error attributable to Mac Peptide or applicable law requires otherwise.

10. Non-Refundable Situations

Unless required by applicable law, refunds or replacements may be denied for issues resulting from:

• Customer ordering errors
• Change of mind
• Improper storage
• Improper handling
• Unauthorized use
• Product misuse
• Failure to follow product-specific storage requirements
• Delayed collection after confirmed carrier delivery
• Customer-provided incorrect shipping information
• Experimental outcomes
• Compatibility with a particular research method
• Expected results not being achieved
• Products used outside their stated research-only scope

Mac Peptide does not guarantee specific experimental results from any research material.

11. Opened or Used Products

Opened, used, reconstituted, altered, transferred, or otherwise handled research materials are not eligible for return.

Once product integrity or chain of custody can no longer be independently confirmed, Mac Peptide cannot reintroduce the item into inventory.

This restriction helps maintain responsible laboratory supply practices and appropriate quality-control standards.

12. Laboratory Accessories

Return eligibility for laboratory accessories may depend on the product’s nature and condition.

For hygiene, integrity, and safety reasons, certain individually packaged or single-use laboratory accessories may not be eligible for return after packaging has been opened or compromised.

Any eligible accessory return must generally be:

• Unused
• Unopened
• In original packaging
• In resalable condition
• Approved by Mac Peptide before being returned

Do not send a product back without prior authorization.

13. Unauthorized Returns

We may not accept, refund, or replace products returned without prior approval.

Before returning any eligible item, contact Mac Peptide and wait for return instructions.

Approved return instructions may include:

• Return authorization
• Shipping directions
• Packaging requirements
• Required documentation
• Applicable return deadline

Mac Peptide is not responsible for unauthorized returns sent to an incorrect address.

14. Return Shipping Costs

Responsibility for return shipping costs depends on the reason for the approved return.

If a return results from a verified Mac Peptide fulfillment error, we may provide return instructions or otherwise address reasonable return shipping costs where applicable.

For any discretionary return that is approved for reasons unrelated to a Mac Peptide error, the customer may be responsible for return shipping costs.

15. Shipping Damage Claims

Report shipping damage promptly, as carrier claim requirements may have time limitations.

Keep:

• Original shipping box
• Packing materials
• Product packaging
• Product labels
• Damaged items

These materials may be required to support an investigation with the shipping carrier.

Failure to retain relevant evidence may affect our ability to review the claim.

16. Lost or Delayed Packages

A delayed shipment is not automatically considered lost.

If tracking information indicates that a package is still in transit, additional carrier processing time may be necessary.

For packages believed to be lost, Mac Peptide may:

• Review carrier tracking
• Contact the shipping provider
• Request additional customer information
• Open a carrier investigation where appropriate

Mac Peptide will make replacement or refund decisions after reviewing available shipping information.

17. Incorrect Shipping Address

Customers are responsible for providing accurate shipping information at checkout.

Mac Peptide cannot guarantee changes after an order has entered fulfillment.

Refunds or replacements may not be available when a package is:

• Delivered to the address entered at checkout
• Returned because of an incomplete address
• Returned because of an incorrect address
• Refused by the recipient
• Undeliverable because of customer-provided information

If a package is returned to Mac Peptide, contact us so we can review available options.

18. Research Results Are Not Grounds for a Refund

Mac Peptide supplies products as laboratory research materials.

Experimental outcomes can be influenced by:

• Research design
• Equipment
• Handling
• Storage
• Analytical methodology
• Environmental conditions
• Material compatibility
• Researcher procedures

A product is not eligible for refund solely because a laboratory experiment produces an unexpected or undesired result.

Researchers are responsible for independently determining suitability for their specific experimental requirements.

19. Certificate of Analysis and Batch Documentation

Where applicable, customers should review the relevant Certificate of Analysis (COA) and any available batch documentation for their material.

Compare the batch or lot identifier on the product with the corresponding analytical documentation, where available.

Submit questions about COA documentation to our support team before conducting research when clarification is required.

20. Chargebacks and Payment Disputes

If you experience a problem with an order, please contact Mac Peptide before initiating a payment dispute whenever possible.

Our support team will make reasonable efforts to investigate legitimate concerns involving:

• Incorrect orders
• Missing products
• Shipping issues
• Duplicate charges
• Approved cancellations
• Verified fulfillment errors

Submitting false, misleading, or fraudulent payment disputes may result in account restrictions and may be contested using available transaction and fulfillment records.

21. Abuse of the Returns Process

Mac Peptide reserves the right, where permitted by law, to restrict refunds, replacements, accounts, or future purchases where we reasonably identify:

• Fraudulent claims
• Repeated abuse of refund procedures
• Altered evidence
• Misrepresentation of delivery circumstances
• Unauthorized product use
• Attempts to exploit promotional or replacement policies

We will continue to review legitimate customer concerns fairly based on available information.

22. Applicable Consumer Rights

Nothing in this policy is intended to eliminate or restrict rights that cannot legally be waived under applicable law.

Where mandatory consumer protection laws provide greater rights than those described in this policy, the applicable legal requirements will control.

23. Policy Updates

Mac Peptide may update this Refund & Returns Policy periodically to reflect changes in:

• Fulfillment procedures
• Shipping practices
• Product categories
• Customer service processes
• Legal or regulatory requirements

We will post the current version on our website with an updated effective date.

24. Contact Mac Peptide

If you have questions about a damaged, missing, incorrect, or otherwise eligible order, contact us with your order number and supporting information.

Mac Peptide
Email: info@macpeptides.com
Phone: +1 (728) 206-4000

Please do not return any product until you have received authorization and return instructions from Mac Peptide.

Research Use Notice

Mac Peptide products are supplied for controlled laboratory and analytical research purposes only.

For laboratory research use only. Not for human or veterinary use. Not intended to diagnose, treat, cure, or prevent any disease.

Ye policy research-material ecommerce model ke liye intentionally product integrity, batch traceability, damaged/incorrect shipment aur research-only compliance ko cover karti hai. Exact return window agar client ka specific rule hai, jaise 7 days, 14 days, ya no returns after shipment, to usko final version mein clearly add karna chahiye.