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Shipping Policy

Effective: March 11, 2026 · peplix.bio · support@peplix.bio

1. Order Processing

All orders are processed on business days (Monday through Friday, excluding U.S. federal holidays). Orders placed before 12:00 PM Central Time on a business day are typically processed the same day. Orders placed after 12:00 PM or on weekends and holidays are processed the next business day.

Processing time is 1–2 business days from order confirmation. You will receive a shipping confirmation email with your USPS tracking number once your order has been dispatched.

2. Cold-Chain Packaging

Peptide research compounds are sensitive biological reagents that require temperature-controlled handling during transit. All Peplix orders include cold-chain packaging at no additional cost to the purchaser.

Standard Cold-Chain Packaging Included With Every Order

  • Insulated shipping container (EPS foam or equivalent)
  • Ice packs or dry ice depending on ambient temperature forecast and transit time
  • Moisture-barrier sealed inner packaging
  • Desiccant sachet to control humidity
  • Outer shipping box rated for USPS handling conditions

3. Available Shipping Services

Peplix ships exclusively via USPS. Five service levels are available at checkout. Service availability depends on destination — domestic services are available for all U.S. addresses; international services are available for eligible countries.

3a. USPS Ground Advantage

Our most economical domestic shipping option, suitable for orders where transit time is not critical.

  • Estimated transit: 2–5 business days
  • Full USPS tracking included
  • USPS-included insurance up to $100
  • Available to all 50 U.S. states, territories, and APO/FPO/DPO addresses
  • Not available for international destinations
  • Cold-chain packaging included — recommended for cooler months or shorter transit routes

3b. USPS First Class Mail (Domestic)

Available for domestic orders with total package weight under 13 oz. Fast, economical option for lightweight orders.

  • Estimated transit: 1–3 business days
  • Full USPS tracking included
  • USPS-included insurance up to $100
  • Weight limit: packages must be under 13 oz total
  • Available to all 50 U.S. states, territories, and APO/FPO/DPO addresses

3c. USPS Priority Mail (Domestic) — Recommended

Our recommended domestic shipping service for most orders. Priority Mail shipments are transported by air with the fastest guaranteed domestic transit window.

  • Estimated transit: 1–3 business days
  • Full USPS tracking included
  • USPS-included insurance up to $100
  • No weight limit — suitable for all order sizes
  • Available to all 50 U.S. states, territories, and APO/FPO/DPO addresses
  • Recommended for summer months when cold-chain integrity is most critical

3d. USPS First Class Package International

Most economical international shipping option. Suitable for non-time-critical international orders.

  • Estimated transit: 7–21 business days (varies significantly by destination)
  • Limited tracking — USPS provides tracking to point of departure from the U.S. only
  • No USPS-included insurance — purchaser assumes all risk of loss or damage
  • Available to eligible international destinations (see Section 5)
  • Weight limit applies — eligible for lightweight single-vial orders

3e. USPS Priority Mail International — Recommended for International

Our recommended service for all international orders. Faster transit, full end-to-end tracking, and USPS-included insurance.

  • Estimated transit: 6–10 business days to most destinations
  • Full USPS tracking to most destinations
  • USPS-included insurance up to $200
  • No weight limit — suitable for all international order sizes
  • Includes USPS-provided customs documentation

4. Shipping Rates

Shipping rates are calculated in real time at checkout based on your delivery address, package weight, and selected service level. Rates reflect current USPS postage pricing. Peplix does not mark up shipping rates — you pay USPS rate plus the cost of cold-chain packaging materials.

5. International Shipping

5.1 Eligible Destinations

Peplix ships internationally to most countries served by USPS international mail services. However, due to the nature of synthetic peptide research compounds, we reserve the right to restrict shipment to certain destinations based on import regulations, customs enforcement patterns, or compliance considerations.

It is the purchaser’s sole responsibility to verify that the import of ordered research compounds is legal in their destination country prior to placing an order. Peplix will not issue refunds for orders seized or detained by customs authorities.

5.2 Customs, Duties & Import Taxes

International shipments may be subject to customs inspection, import duties, value-added tax (VAT), and other fees levied by the destination country’s customs authority. These charges are entirely the responsibility of the purchaser and are not included in the Peplix order total or shipping charge.

  • Peplix will accurately declare package contents on all customs documentation
  • Products will be declared as: Research Reagents / Synthetic Peptide Reference Standards
  • Declared value will reflect the actual invoice value of the order
  • Peplix will not falsify customs declarations, undervalue shipments, or mislabel package contents under any circumstances

5.3 Customs Delays

International shipments are subject to customs inspection and clearance. Customs processing times vary widely by country and are entirely outside Peplix’s control. Estimated transit times do not include customs clearance time. Peplix is not responsible for delays caused by customs inspection.

6. Tracking & Delivery Confirmation

A USPS tracking number is provided for all domestic shipments and for Priority Mail International shipments.

  • Domestic tracking: Full end-to-end USPS tracking available at usps.com
  • Priority Mail International: Full tracking to most destinations
  • First Class International: Departure scan only — no in-country tracking in most destinations

If your tracking number shows no movement for more than 5 business days (domestic) or 15 business days (international), contact support@peplix.bio with your order number and we will open an inquiry with USPS.

7. Lost or Damaged Shipments

7.1 Domestic Lost Shipments

If a domestic USPS shipment has not been delivered within 15 calendar days of the ship date and tracking shows no movement, Peplix will file a USPS missing mail search on your behalf. If USPS confirms the shipment as lost, Peplix will dispatch a replacement shipment or issue a refund.

7.2 International Lost Shipments

For Priority Mail International shipments that include USPS insurance, Peplix will file a claim on your behalf if the shipment is confirmed lost or damaged. Claims require a minimum of 40 calendar days from the ship date before USPS will accept a lost shipment claim.

For First Class International shipments, no insurance is included and Peplix cannot file claims. Purchasers selecting First Class International accept full risk of loss in transit.

7.3 Damaged Shipments

If your order arrives visibly damaged, photograph the outer packaging and inner contents immediately before handling or discarding any packaging materials. Submit photographic evidence to support@peplix.bio within 48 hours of delivery. Peplix will assess the claim and coordinate replacement or refund in accordance with our Refund Policy.

8. Delivery Address Accuracy

The purchaser is solely responsible for providing a complete and accurate delivery address at checkout. Peplix will ship to the address provided and cannot be responsible for non-delivery resulting from an incomplete, incorrect, or undeliverable address.

  • Address corrections after dispatch are not possible — USPS does not support in-transit address changes
  • Packages returned as undeliverable will not be re-shipped without payment of a re-shipment fee
  • Returned packages will be assessed for product integrity before any re-shipment — compromised products will not be re-shipped

9. Shipping Enquiries

For all shipping-related questions, tracking enquiries, and lost or damaged shipment claims, contact Peplix:

Email: support@peplix.bio
Phone: +1 (307) 533-3570
Business Hours: Monday – Friday, 9am – 5pm EST
Website: peplix.bio

Peplix reserves the right to update this policy at any time. Changes will be posted on this page with an updated effective date.