As far as I know, it is illegal for a company to sell contact lenses without verification. Having said that, I am sure there are some online sites that let you do that (google please) . If I were you, I would try to find someone who has the same prescription and ask him/her to buy the lenses for me. What's your brand and power?

Will I get in legal trouble if I buy contact lenses without a copy of my prescription?

• You won’t break any laws, but the company is selling you a prescription device as if it were an over-the-counter device. In legal terms, this misbrands the device. The company is also violating FTC regulations by selling you contact lenses without having your prescription. For more information, see the The Contact Lens Rule: A Guide for Prescribers and Sellers¹.

(Source: http://www.fda.gov/medicaldevices/productsandmedicalprocedures/homehealthandconsumer/consumerproducts/contactlenses/ucm062347.htm)