Is a spouse able to buy another home to live in when going through a separation, without requiring the other spouse to sign anything? There's no agreement on assets and liabilities and it is my understanding that a family law declaration would need to be signed by both parties to enable the purchase of another property by one spouse, while still legally married. Also, if the property is bought as a 'buy-to-let' and the spouse lives in it, will this cause any issues legally?