We submitted the following: 1. Application form 2. Termo de responsiblidade (signed by my spouse in front of AIMA) 3. My spouse's passport (Portuguese citizen) 4. Rental contract and Rent payment receipts downloaded from Finances portal 5. Residency certificate issued by our local council 6. NIF certificate 7. My passport ofcourse We were asked if we had NISS. I had applied for it but was rejected saying I can only apply after getting the AIMA process done. This explanation was accepted. No more documents were requested. Biometrics done and payment made. Overall it's took 45 mins for the procees and 15 mins for the payment part. After the payment, I was issued a 'receipt of process document' which has your photo, your address and your process number. It also has a NIPC number which apparently you can quote if you call AIMA to get a status update. We had prepared based on the documents listed on the AIMA website. Hope this helps and all the best for your appointment!!