In case of one-time payments, a contract for air ticket sale is not concluded, as a rule. Paying the invoice, you accept the terms of purchase and sale of air tickets, terms of services published on the website of the airline company.
If, for any reason, you need to sign a contract to pay the invoice, you can download and fill out a Long-Term Customer Association Agreement. You need to read the contract, print two copies of it, sign, stamp and send them to the address: 1, Yuri Gagarin Ave., office 753, 196105, St. Petersburg, USC LLC.