unstamped meaning in English

未盖戳的

Validity of unstamped documents
未加盖印花文件的有效性
Every and any assurance and act ( if any ) which shall not be precluded by these conditions of sale and which shall be required by the purchaser for getting in , surrendering , or releasing any outstanding estate , right , title or interest or for completing or perfecting the vendor ' s title or for stamping any unstamped or insufficiently stamped documents , or for any other purpose shall be prepared , made and done by and at the expense of the purchaser requiring the same
除此章程规定外，如买主须要做任何契据或其他手续以令此物业之契据得以十足完备，或将上手未付印花税之契据或未付足印花之契据补付印花税者，凡此一切印花税及各项费用之支付概由买主负责。