Eastern Auctions Ltd. has memberships in these organizations
- American Philatelic Society
- American Stamp Dealers’ Association
- British North American Philatelic Society
- Canadian Philatelic Society of Great Britain
- Canadian Stamp Dealers’ Association
- National Stamp Dealers Association (NSDA)
- Royal Philatelic Society Of Canada
- Philatelic Traders’ Society
- Postal History Society of Canada