Although a legal separation agreement is a legally binding document, one spouse cannot force the other to sign it. Assent to the agreement must be voluntary. If your spouse refuses to sign the agreement, you will not have a separation agreement in place.
It is crucial that an individual not use coercion, threats, manipulation, or improper attempts to persuade a spouse to sign the agreement. If a party can show that such circumstances existed during the signing, the contract may be determined to be unenforceable. Anyone who has signed a separation agreement as a result of fraud, duress, or undue influence should seek legal assistance immediately.