2 sentences for 致 (zhì — send)

1. 他在离职前给每位同事致了感谢信。

   tā zài lí​zhí qián gěi měi wèi tóng​shì zhì le gǎn​xiè​xìn.

   Before leaving, he sent a letter of thanks to each of his colleagues.

   Source: Dong Chinese Dictionary

2. 为了报答救命之恩，他专门制作了一面锦旗前去致谢。

   wèi​le bào​dá jiù​mìng zhī ēn, tā zhuān​mén zhì​zuò le yī miàn jǐn​qí qián​qù zhì xiè.

   To repay the kindness of saving his life, he specially made a silk banner to express his thanks.

   Source: Dong Chinese Dictionary