For Common Law you need to prove a marriage like relationship and that you have resided together for at least 1 year in that relationship.
This includes proof of living together, financial co-dependance, emotional co-dependance, family/friend knowledge, etc.
Examples I used:
Hard Evidence:
Occupant letter from landlord from first landlord where I was added in the beginning.
New lease for new apartment we went to with both of our names.
Joint bank account in Canada.
Life insurance policy on him with myself listed as 100% beneficiary.
Cable bill in both names.
Hydro bill in both names.
Statutory Declaration of Common-Law Union
17 letters of support from friends and family. (NOTE: When applying Common Law 2 of your letters have to be notarized! - I chose my grandmother's letter, a long time friend, and his mother as notarized letters)
Soft Evidence:
Mail in both our names
Photos - of us together.. others are what we took of each other during those events, or with each other's pets or with each others family or friends or with a picture of us with gifts we got for each other.
Phone logs for voice from May 2011 to present, Text from November 2011 to present, Skype receipts.
Skype receipts for the past year to show I've purchased it to use for communicating if we could not via phone (I used this before I got a Canada/US calling plan)
Bank statement printouts for proof of purchases of Grocery stores or Walmart, etc from my account and his, and our joint account (for shared household expenses during my time here)
[bAround 40 ]Bank statement printouts for proof of purchases (GIFT EVIDENCE)[/b]
Receipts from his mom from the veterinarian where she paid to have my cat fixed, and also a receipt where she paid around $2000 worth of dental work for me.
Bank statements from his mom to prove purchases of travel insurance for me, plane ticket purchases, gifts, etc. (Shows family ties)
Concert ticket where we went to see Within Temptation in September with my friends from Canada that I've known longer than him.
Bank Statement to show purchase of Segwun Steamboat tickets for 2 dates.
Bank Statements to show purchases of movie tickets (2 adults.. or 3 if we brought his brother), etc.
Facebook printout of wall and album with comments from friends/family.
Letter from both of us stating how our relationship has been, what we're looking toward the future, etc. Couple pages each.
Printed time-line roughly outlining our relationship month by month.
Email from grandma where she says things about our relationship to me personally, about how happy she is, etc.
Wire transfer email confirmation of $800something money transfer from my bank account to his.
10 Emails between us ... most of it's blacked out because I don't want to expose personal stuff... so that's why there are only 10 salvageable that could be shared.
Reciepts for purchase both of our subscription for the past year to World of Warcraft, the game where we met and play together.
Holiday cards from friends and family with both of our names on them.
Ecards to each other.
Probably more things but this is long winded hahaha... I listed details of what the point of the item was because in my package I included that. Like the concert ticket was not just us, but was also friends (friends who actually wrote letters of support and have photos with) so it shows consistency between the different types of evidence.
Good luck!