Q: TN1 - Change of employer

Hello, I am a Canadian and have been working in the US for the last 5 years under TN1. I am looking to change employers but all the employers who are willing to hire me and provide the job offer letter are not willing to provide me the Letter of Support that outlines why I am eligible for TN1. Can I myself (under oath) write such a letter or have an immigration lawyer write one on my behalf. I am having a hard time persuading the prospective employers. I have even sent them a copy of such letter that my current employer provided me with. Please help. Thanks in advance! Sincerely, Soham Tiwari

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