You can just make a simple table on a word document, and declare the remaining work experience that didn't fit in the 3 slots on the form, upload and send that. Her parents, eldest sister, brotherinlaw, two nieces, sisterinlaw, and herself are currently living at this address.What Are Invitation Letters Used For? How Should the Invitation Letter be Submitted? If you cannot obtain a letter, you should discuss with your lawyer what alternative forms of evidence you can provide USCIS. You must establish that you meet the requirements under U.S. law to receive a visa. It is crucial for employers to understand that they are legally obligated to bear all costs related to the LMIA application.