Originally Posted by
EGoodhue
A letter to explain everything will be helpful for the CO - but also as much evidence as possible to back up your claims, so a letter from your rental agency to explain the arrangement and add credibility to the facts. Your relationship will be assessed to make sure it meets the four-fold test:
1. Statements and evidence are credible - that is, are the claims believable and is there evidence from credible sources to back it up
2. You are living together - this is only one part of what is assessed, so don't forget to include evidence other than tenancy agreements and mail
3. Your reasons for entering the relationship were genuine and you both have the intention to maintain a long-term exclusive relationship - this is where a CO assesses the likelihood of the relationship being for the purposes of getting a visa only, or if it's a true partnership
4. The relationship is likely to endure - again, the CO needs to see that your relationship is likely to continue after the grant of the visa and one partner isn't going to end the relationship as soon as they have the visa
I wouldn't worry too much about organising your application in a folder of any kind - the INZ mailroom will collate your application into the same format as all other applications once they open the mail you send it in, so don't go to too much trouble as INZ will probably just undo it all once they receive it anyway.