Policy
Shipping & Returns
All shipments are packaged as laboratory reagents and released only to the verified research account on file. Effective September 2, 2026.
Domestic shipping options
Standard
$14
- Processing: 3–5 business days
- 2 business days in transit
- 5–7 business days total
Expedited 2-Day
$25
- Processing: 1–2 business days
- 2 business days in transit
- 3–5 business days total
Overnight
$75
- Processing: Same to next business day
- Next-day delivery
- 1–2 business days total
Orders are processed in the order received unless an expedited method is selected. Overnight orders placed before 12:00 PM CT ship the same business day; later orders ship the next business day. Transit estimates begin once the package leaves our facility and exclude weekends and holidays.
Business operating days
Monday through Friday, 9:00 AM – 5:00 PM CT, excluding company-observed holidays (New Year's Day, Memorial Day, Independence Day, Labor Day, Thanksgiving Day and the day after, Christmas Eve, Christmas Day, and New Year's Eve).
Carrier notes
Carriers do not deliver to P.O. Boxes or certain restricted addresses. Please supply a physical laboratory, institutional, or business address. Temperature-sensitive materials ship with appropriate cold-chain packaging; we recommend scheduling delivery for a day when the shipment can be received and stored promptly.
International shipping
We can ship to most international destinations, though restrictions apply to some materials. Customers are responsible for confirming that ordered products may be legally imported into their country and comply with all local laws, regulations, and customs requirements.
Any delays, holds, returns, refusals, seizures, or other customs actions are outside our control and remain the responsibility of the customer. Duties, taxes, and brokerage fees are the customer's responsibility. Refunds or replacements cannot be provided for orders affected by customs restrictions or actions taken by local authorities.
Returns
We do not accept returns on released material. If there is an issue with your shipment — wrong item, damage, or a missing or delayed package — contact us and we will resolve it.
Contact support@sennaresearch.com with your order number and lot number. We typically respond within one business day.
Damaged or non-conforming shipments
Inspect every shipment on arrival. Report damage, temperature excursions, or label discrepancies within 48 hours of delivery, with photographs where possible. Verified issues are replaced or credited at no cost.