Writing formal letters

Thank you letter https://www.hashdoc.com/documents/14782/thank-you-for-information-sample-letter http://www.writeexpress.com/thanky04.html Letter of agreement http://www.writersplace.org/sample-letter-of-agreement/ Confirmation letter (job reference) https://14f29f03-a-385b92d4-s-sites.googlegroups.com/a/englet.com/business-letter-sample/confirmation/Employment%20Confirmation%20Letter.JPG?attachauth=ANoY7cqWlOZJId-PQzBuk-IOpVlMZALBH8xw4x_YDn78wVJLZISnZgHJ66IE7Z3CggVJsCqmJdpuRsCyWNtU36nmbMyu9dnIPlD0jT0087HVs4eHPDEo4cyNaxT-40YNBnuMTcjY9qTBnV8W5C-5RbsSqxWbLyO46Cii_yRXD15OsPbTY7NMWJ_fUwsfwPyf8LnxBR-0Dmf1bQU3PNKvoDHbnfcnxYSNV19caYR1lPSm_D61VgnQJoFJQ5RRcYbzQ9Fzbr1bzsA_m3YSeAlFtsBTYWDSrvP-wg%3D%3D&attredirects=0