This question seems to come up quite a lot, and the short answer is yes, unless your auctions are French.
Historically, the affiliate user agreement under Commission Junction used to say that affiliates could not promote their own listings. No one’s ever satisfactorily explained the thinking behind this rule to me, but we’ll let that go because the eBay.com affiliate program decided to allow self-linking. That is the same under the new EPN, and the introductory video even suggests that affiliates do so.
However, that goes only for the .com program. Two other programs, the UK and French ones, currently have clauses in their user agreements that forbid self-linking. The good news for UK affiliates is that this is changing. From an email just received from EPN Support:
Very recently, the UK team has recently decided to allow this behavior going forward, however, we haven’t updated the terms of service to reflect this change yet.
Anyone currently linking their own listings is probably not receiving any affiliate payments for doing so, but this will change shortly. There’s no word on similar changes to the French network.
Affiliates in all programs should remember that clicking their own links and registering, buying or bidding is not permitted.