An addition of something to a document after it has been signed Such additions are ignored unless they are initialed by the signatories and, if applicable, witnesses (eg wills)
{i} writing inserted between the lines in a document or text (esp. in a contract); addition to a contract that was made after it was signed and must be initialed by both parties in order to be valid (Legal)
That which is interlined; a passage, word, or line inserted between lines already written or printed