USPS Certified Mail® (the green envelopes) and USPS Priority Express® (the blue envelopes) are NOT to be used. These require a signature during pickup and may be returned to you.
If you’d like a tracking number, use USPS Priority Mail® (the red envelopes). This costs around $6 and ensures delivery in 2-3 days.
Please do not write “Greenpoint Seeds” or “Greenpoint” on anything. “GPS” should instead be used on the outside of the envelope.