Before leaving the country be prepared with the following tips
Get photo copies of important documents like
Passport
Visa
Birth Certificate
Vaccination Records
His divorce order (if he was already married)
His naturalization certificate
Any official papers that he has sent you including visiting cards, letter from his employer
Get copies of personal documents
Photographs of any engagement ceremony
Photographs of both of you together
His photographs
Correspondence between you both
Telephone bills showing your calls to him
At this juncture, it is important that you be careful about what you write to him in your mails. Do not reveal too many personal details or anything else that can be used as evidence against you later, if he has a twisted mind.
Get copies of all financial transactions
Receipts of materials spent on the alliance
Receipt of the visa fee
Receipt of phone calls
Receipt of purchase of air tickets
Remember nothing is unimportant