The words used to disclose a paid relationship. Regulators accept clear terms like Ad and Paid partnership and have specifically rejected ambiguous ones like sp, collab and gifted on their own.
In the United States, a material connection between a brand and an endorser must be disclosed clearly and conspicuously, in the same medium as the claim.
The UK Advertising Standards Authority's rules on influencer marketing, which are stricter than the US on wording and require the label to be visible before any interaction..