Affiliate brand bidding is when an affiliate buys paid-search ads on your brand name or trademarks and sends the clicks through their affiliate link, earning commission on customers who were already looking for you. Google doesn't restrict trademarks as keywords, so your own brand bidding policy, backed by monitoring and contract terms, decides whether affiliates may do it.
This guide covers the policy options, what the policy has to define, how to monitor search results and tracking data, sample contract language and an enforcement ladder. It is written for affiliate managers and PPC teams at brands running their own programs; if you are setting one up, see how MassPartner works for brands.
Why brand bidding costs more than the commission
Brand bidding looks like a small leak, but it hits you three ways:
- You pay for demand you created. A searcher typing your brand name is already in your funnel. Under last-click attribution, the affiliate's ad click takes the credit and the commission.
- You compete with your own partner. Google says it won't show multiple ads leading to identical or similar landing pages at the same time, even on different domains, and shows the one with the highest Ad Rank. An affiliate ad that lands on your site can therefore take the slot your own brand ad would have filled.
- You lose control of the message. Affiliate ads on brand queries can promise discounts you don't offer, imply they are the official site, or skip disclaimers that regulated verticals require.
Brand-plus-modifier queries such as "brand promo code" or "brand login" are the most exposed: they come from people who are about to buy or already customers.
What Google allows and what it doesn't
Google's trademark policy does not restrict the use of trademarks as keywords. A trademark owner can file a complaint, after which Google may restrict use of the trademark in ad text, within the countries where the owner has shown trademark rights.
Two limits make a complaint a weak tool against affiliates:
- It doesn't stop keyword bidding at all, only trademark use in the ad itself.
- Google's exceptions allow resellers and informational sites to use a trademark in ad text, and an affiliate review or comparison page may qualify as informational.
Other search engines have their own policies and complaint processes, so check each one your affiliates use. In every case, the enforceable rule is the one in your affiliate agreement.
Brand bidding policy options
There is no single right answer. The choice depends on whether you run your own brand campaigns, how strong your organic brand presence is, and whether some partners genuinely add reach.
| Policy | What affiliates may do | Fits when |
|---|---|---|
| Full ban | No bidding on brand terms, variations or brand-plus-modifier queries; no brand in ad text, display URLs or domains | You run brand campaigns in all your markets |
| Modifier ban | Bidding on generic category terms allowed; brand terms plus "coupon", "promo code", "login" and similar always banned | You want PPC affiliates on non-brand traffic only |
| Approved exceptions | Named partners may bid on a written keyword list in specific countries or engines | You don't advertise in some markets and a partner does |
| Reduced rate | Paid brand traffic allowed but paid at a lower commission | You can identify paid-search traffic reliably |
| No paid search | Affiliates may not run paid search for your brand at all | Small teams that can't monitor a nuanced policy |
Most programs combine a full ban with an approved-exceptions route. Whatever you choose, ban direct linking from paid ads to your site unless you approve it, because that's the setup that competes head-on with your own ads.
What the policy has to define
Vague policies produce disputes. Spell out:
- Brand terms: trademarks, product names, your domain, common misspellings, abbreviations, translations and transliterations used in your markets.
- Combinations: brand terms alone or combined with any other word, including coupon, promo, discount, login, app, review and "vs".
- Match types: all of them. Broad match can trigger ads on brand queries even when the brand isn't a keyword, so require brand terms as negative keywords.
- Ad elements: headlines, descriptions, display URL paths, sitelinks and other assets.
- Channels: every search engine, shopping ads, app store search ads and social search ads you care about.
- Domains and handles: no brand terms in domains, subdomains or social account names.
- Who is bound: the affiliate, its agencies, and any sub-affiliates.
- Exceptions: only in writing, listing keywords, engines, countries and dates.
Publish the policy on your program page and attach the brand term and negative keyword list, so partners can't claim they didn't know.
How to monitor affiliate brand bidding
Check the search results
Search your brand terms regularly in each country and on mobile and desktop. Unlike a normal search, Google's Ad Preview and Diagnosis tool previews the results for a keyword without accumulating impressions on your own ads.
If you run brand campaigns, the auction insights report shows which other advertisers compete in the same auctions, with impression share, overlap rate and how often they rank above you. A new name appearing on your brand campaign is a prompt to search and capture evidence.
When you find a violating ad, record the query, country, device, date and time, a screenshot of the ad, and the landing URL including the affiliate ID or redirect chain.
Read the tracking data
Your affiliate data shows brand bidding even when you never see the ad:
- clicks from content or coupon affiliates that carry ad-platform click IDs such as
gclidormsclkid, orutm_medium=cpc; - a high share of conversions within minutes of the click;
- affiliate sales that rise and fall with your brand search volume, for example around launches or TV campaigns;
- one sub-ID producing most of a partner's conversions with little visible content behind it.
Block paid search at the click
In MassPartner, each campaign can allow or block traffic sources, including Paid Search, and blocked clicks are logged with the reason and appear in click reports. A blocked click gets no click ID, so it can't earn a commission. Be clear about the limits: source detection relies on signals such as ad click IDs, utm_medium and the referrer, so an affiliate who strips them will look like direct traffic, and no tracking platform can see which keyword triggered an ad. It enforces "no paid search", not "no brand bidding". Search monitoring is still required.
Sample brand bidding contract language
Put the policy into the affiliate agreement itself, not just a help page. Example clause, to adapt with counsel for your jurisdictions:
1. "Brand Terms" means [BRAND], [PRODUCT NAMES], [DOMAIN] and any
misspelling, abbreviation, translation or confusingly similar
variation, used alone or combined with other words.
2. Affiliate shall not, directly or through any third party:
(a) bid on Brand Terms as keywords on any search engine, shopping
or app-store advertising platform;
(b) use Brand Terms in ad text, display URLs, ad assets, domain
names or social media handles;
(c) link paid search ads directly to Brand's websites.
3. Affiliate shall add Brand Terms as negative keywords in all paid
search campaigns that promote Brand.
4. Exceptions apply only with Brand's prior written approval listing
the keywords, engines, countries and period.
5. Brand's search monitoring records and tracking data shall be the
basis for determining a breach.
6. On breach, Brand may withhold or reverse commissions on traffic
from the violating campaigns, suspend Affiliate's tracking links,
and terminate this Agreement for material or repeated breaches.
Our affiliate agreement template shows where this sits alongside the other prohibited-methods clauses. MassPartner's AI-assisted contract generation includes prohibited-actions clauses, and affiliates sign electronically with version history, so you can show which terms a partner accepted and when.
An enforcement ladder affiliates can predict
Consistency matters more than severity. A ladder you publish and apply evenly:
- Document. Capture the evidence above before contacting anyone.
- Notify. Send the evidence and require removal within a fixed window, for example 24 hours, plus confirmation that negative keywords are in place.
- Withhold and reverse. Reverse commissions on conversions from the violating traffic. This only works if those commissions are still pending, which is why a hold period matters.
- Escalate. Suspend links on a second violation and terminate on a third, or immediately for deliberate cases such as ads impersonating your official site.
- Back up with platform tools. File a trademark complaint to restrict ad-text use where it applies, knowing it won't stop keyword bidding.
Example: an affiliate's ad appears on "brand promo code" in two countries for nine days, and 140 conversions in that period carry gclid parameters. The brand reverses those 140 pending commissions, keeps paying the affiliate's organic conversions, and records the notice in the partner file. The numbers are illustrative.
For other traffic patterns worth investigating, see our guide to affiliate fraud detection.
Set and enforce your brand bidding rules
MassPartner lets you block paid search per campaign with every blocked click logged, hold conversions for manual or delayed approval, and issue e-signed contracts with prohibited-actions clauses. Compare plans on the pricing page.
FAQ
Is affiliate brand bidding illegal?
Not in itself. Google's policy doesn't restrict trademarks as keywords, so for affiliates the binding rule is usually the program's contract. Whether a specific ad infringes trademark law depends on the country and on how the trademark is used in the ad.
Can Google stop affiliates bidding on my brand?
Only partly. A trademark complaint can restrict use of your trademark in ad text, not keyword bidding, and Google's exceptions for resellers and informational sites can still allow some ad-text use.
Should a program ever allow brand bidding?
Some do, usually for named partners in countries or engines where the brand doesn't run its own ads, with a written keyword list and sometimes a lower commission. Any exception should be specific, written and time-limited.
What evidence do I need to reverse commissions for brand bidding?
The query, country, device, date and time, a screenshot of the ad, and the landing URL showing the affiliate ID, plus the conversions from that traffic in your tracking data. Your agreement should state that these records are the basis for deciding a breach.
Why require affiliates to add negative keywords?
Broad and phrase match can show an affiliate's generic ads on brand queries without anyone bidding on the brand directly. Requiring brand terms as negative keywords closes that gap and removes the "it was an accident" defense.