Recent detentions at US borders have led the UK, Germany, and Nordic nations to update their travel advice. These updates inform citizens that holding valid travel authorisation like a visa or ESTA does not guarantee entry into the US. The warnings follow incidents of European travellers being detained or denied entry, attributed to stricter US immigration enforcement. Denmark and Finland have specifically cautioned transgender and non-binary individuals about potential entry issues due to the US government's stance on gender markers. Travellers are now advised to carry extra documentation and be prepared for thorough questioning upon arrival in the US. These revised advisories reflect growing European concern over the increased rigidity of US border controls.