If you go to protonvpn.com and pay via credit card, PayPal, or Bitcoin:
Proton VPN typically does not use traditional "activation codes" for its service. Instead, the "activation" process is handled through or gift cards . How Proton VPN "Activation" Works proton vpn activation code
: This code is generated by apps like Google Authenticator or Authy to prevent unauthorized access. If you go to protonvpn
Enter the 6-digit code generated by the app to confirm the link. proton vpn activation code