Yes, that temporary waiver application has to be submitted (by Canadian citizens or landed immigrants to Canada)_ to the CBP inspector at the POE.
The fee is $585 and the processing time can be quite lengthy, up to a year or more. Best to consult with a competent immigration lawyer to see if you'll even need such a waiver, which is usually for some rather severe inadmissibility grounds, such as rape, theft, aggravated battery, prostitution.....and fraud.
Behar Intl. Counsel 619.234.5962 Kindly be advised that the answer above is only general in nature cannot be construed as legal advice, given that not enough facts are known. It is your responsibility to retain a lawyer to analyze the facts specific to your particular situation in order to give you specific advice. Specific answers will require cognizance of all pertinent facts about your case. Any answers offered on Avvo are of a general nature only, and are not meant to create an attorney-client relationship.
Yes but do hire an immigration attorney. You do not want to handle U visa waiver issues on your own.
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