How do I choose an influencer marketing agency?

Start with the model, not the vendor

The first decision is which of three arrangements you are buying, because comparing vendors inside the wrong model wastes the evaluation. A managed partner, a self-serve marketplace and an in-house team do the same work in different hands, and they differ in one place that drives everything downstream: whose name is on the creator contract.

A marketplace is fast to start and leaves every obligation with the buyer, with nobody to escalate to on the night before a launch. It fits high-volume content work where a single asset is replaceable. A managed partner takes sourcing, negotiation and delivery off the buyer's plate and raises two questions that must be answered in writing: does the usage license run to the buyer or to the partner, and what survives if the relationship ends. An in-house team gives full control and direct creator relationships, at the cost of owning every failure itself, including a creator who stops answering once the brief is signed.

Whoever holds the creator contract is the only party with a direct claim against the creator.

Disclosure liability stays with the brand

Hiring a partner does not move compliance risk off the brand. The FTC Endorsement Guides at 16 CFR 255.1(d) place liability on the advertiser for misleading statements made through endorsements and for failing to disclose unexpected material connections. The same paragraph says an advertiser may be liable for a deceptive endorsement even when the endorser is not. FTC staff guidance is blunter: delegating part of a promotional program to an outside company does not relieve the advertiser of responsibility under the FTC Act.

The July 2023 revision added 255.1(f), which points at the intermediary rather than the advertiser. It says advertising agencies, public relations firms, review brokers and similar intermediaries may be liable for their roles in creating or disseminating endorsements containing representations they know or should know are deceptive. The same paragraph also covers endorsements that fail to disclose unexpected material connections, including where the intermediary hired and directed endorsers who failed to make necessary disclosures. Each party can be liable for its own role. If a partner tells you compliance becomes its problem alone, ask which section says so. There is not one.

What the Guides ask for is a program. Section 255.1(d) names three duties for advertisers: give endorsers guidance on the need to avoid misleading statements and disclose unexpected material connections, monitor their compliance, and take action sufficient to remedy non-compliance and prevent it in future. The Guides say this is not a safe harbor, and add that good faith and effective guidance, monitoring and remedial action should reduce the incidence of deceptive claims and an advertiser's odds of facing an enforcement action. FTC staff guidance adds two practical points. Where regular monitoring is too much work, it says you should probably switch to pre-approval of posts. An endorser under contract should be monitored for the length of the contract and for a reasonable time after it expires, such as a few months.

The FTC has a second lever for deceptive endorsements. In October 2021 it sent a Notice of Penalty Offenses to more than 700 companies. Per the FTC's announcement, that notice lets the agency seek civil penalties against a company that engages in conduct it knows has been found unlawful in a previous FTC administrative order, other than a consent order.

Audience quality moved from preference to rule

Buying followers or engagement stopped being only a quality problem in 2024. The FTC rule on consumer reviews and testimonials at 16 CFR 465.8 makes it a violation to sell or distribute fake indicators of social media influence, and separately to purchase or procure them. Both limbs apply where the party knew or should have known the indicators were fake and they materially misrepresent influence or importance for a commercial purpose. Per the Federal Register, that rule was published on August 22, 2024 and took effect on October 21, 2024. Unlike the Endorsement Guides, that rule carries civil penalties. The Federal Register notice states that the rule allows courts to impose them under Section 5(m)(1)(A) of the FTC Act, and 16 CFR 1.98(d) sets the maximum for that provision at $53,088 for penalties assessed after January 17, 2025.

Vetting therefore carries legal exposure, not just a quality risk. Per the Influencer Marketing Hub Benchmark Report 2026, fake or bot followers account for 56.5% of all reported fraud and quality issues, more than any other category in its survey. The same report puts fake or purchased engagement at 10.2% and misreported performance metrics at 5.4%, and only 10.9% of respondents selected none of the listed issues. Ask what the check actually is. Reviewing the profile is not a check. A usable answer names the signals: the follower growth curve, comment authenticity, audience geography measured against the target market, and analytics pulled live from the creator's own account rather than a screenshot.

Who owns the footage after the campaign ends

Paying a creator does not make the brand the copyright owner. Under 17 U.S.C. 204(a), a transfer of copyright ownership other than by operation of law is not valid unless it is in writing and signed by the owner of the rights conveyed. Under 17 U.S.C. 101, a work made for hire is either a work prepared by an employee within the scope of employment or a specially ordered work falling in one of nine listed categories. That second route still requires a written instrument signed by both parties. An independent creator is not an employee. With nothing signed, the brand owns no copyright at all. With something signed, the brand holds exactly what that document grants and nothing beyond it. Where the license runs to the partner instead of the buyer, the brand is holding a sublicense to its own campaign assets, and those assets stop being usable when the relationship does.

Three answers settle this before a brief goes out.

• Who is named as the licensee, the buyer or the partner?
• What does the license cover by channel, geography and term, and what happens the day it expires?
• What written step moves the license to the buyer if the partner relationship ends?

Where the paid amplification authorization lives

Paid amplification of a creator's organic post runs on an authorization the creator grants, and that authorization has an owner and an expiry. Per TikTok's Spark Ads documentation, advertisers can publish ads using organic posts made by other creators with their authorization. The same documentation says the creator generates that authorization code inside the TikTok app from the video's ad settings, and that the duration of the code is set when it is issued. The buyer-side questions are the same wherever the campaign runs: which advertising account redeems the authorization, who holds admin access to that account, when the authorization expires, and what the written offboarding step is. A program that lives entirely inside a vendor's advertising account goes dark on the day the contract ends, and the performance history stays behind.

What happens when a creator underdelivers

Ask for the remedy language and read it rather than accepting a summary of it. A vendor who answers that it gets worked out case by case is telling you there is no clause, and the buyer then negotiates from zero after the post is already late. Confirm separately whether the buyer is a named party to the creator contract or a third-party beneficiary of it, because a buyer who is neither has no direct claim against the creator and can only press the partner to act.

Five things are worth finding in the remedy language.

• A cure period stated in days.
• An obligation to supply a replacement creator.
• A pro-rata reduction tied to missed deliverables.
• Who pays for a reshoot.
• An approval window that binds the brand as well as the creator, so a slow internal review does not excuse a late post.

Reporting: ask for the raw numbers, not the deck

Settle reporting before launch, because it is the function buyers hand over least. Per the Influencer Marketing Hub Benchmark Report 2026, reporting and analytics was the least outsourced function in its survey, at roughly 6.9% of selections, so most buyers end up reading the numbers themselves. Ask for platform insight access or a raw export rather than a deck. Agree the metric set before the first post goes live, ask how organic and paid results are separated, and ask which posts were left out of the reported set and why. A report that stops at reach and impressions cannot tell you which creator to run again.

Red flags in the answers

Each of these is checkable inside a single meeting.

• A claim that hiring the partner makes disclosure compliance the partner's problem alone.
• No pre-approval step for paid posts, and no monitoring log anyone can show you.
• Usage rights described out loud but never written, or a license naming the partner with no step that moves it to the buyer.
• Vetting described as reviewing the profile, with no named signal and no audience geography check.
• Case studies that stop at reach and impressions, with no statement of what was excluded from the numbers.
• Refusal to show a redacted creator contract. Redaction is reasonable. Refusal to show the structure is not.

How to decide

Match the model to the shape of the program rather than to the size of the brand. Whichever model you pick, four things need one named owner each: the creator contract, the usage license, the advertising-account authorization and the monitoring log.

• One-off content for paid social, no exclusivity, replaceable assets: a marketplace usually covers it, provided the rights language is read before the first brief goes out.
• Paid amplification, exclusivity windows, a regulated category, or an executive attached by name: use a managed partner and put the usage license in the buyer's name in writing.
• Steady monthly volume, a repeat creator set, and a named internal owner with legal support for contracts and rights: an in-house program is workable, provided someone is accountable for disclosure monitoring every week.

Frequently asked questions