Does it matter if you sign a contract with a name that's not your own?

No, courts have always said that names really don't carry that much weight. You can use any name, character, or symbol you like. The important thing is your identity and that you understand the terms of the contract.

In lots of cases, you will be held accountable for the contract even if you didn't sign anything at all, as long as you agree to the conditions. There are, however, contracts that require a signature -- marriage, debt defaults, and agreements to sell interest in real property -- but they too don't need your real name.