Hi,
This is always asked for common-law partners and sometimes asked for marriage happened right before or even after application. This is to convince them your relations are genuine.
To prove your cohabitation (apart from evidence of long-term communication history) you may provide some of the following:
- photocopies of envelopes/letters/checks/bills addressed to your common residence and having both your names displayed; this might be regular bank account statements or other stuff sent to you residential address to you and your spouse/partner;
- utility bills showing your names and common address, if applicable;
- an affidavit/letter from your neighbors confirming your cohabitation, along with their contact details so that an immigration officer could verify this fact later on if needed;
- address stamps/records in your passports or other documents;
- police or other official certificate with your names and common address, if applicable;
- other documents or cards (e.g. library cards, ID's, passes, whatever) with common address;
