Domestic vs International
Requirements differ by who is sending. Pick the scope that matches your business.
Sender ID registration is required for Spain. The current requirements are shown below as provided by the SMSala Sender ID team.
Sender capabilities
Registration requirements
Restrictions
Sending rules
Operator regulations
4 networks carry SMS traffic in Spain. MNP is live in most markets — run an HLR lookup before routing.
Additional compliance notes
Country & operator-specific guidance maintained by the Sender ID team.
Requirements
Sender ID (SID) – Must be the company name, a registered trademark, or a company-owned product/service name. SID Owner Details – Name, surname, and NIF/VAT ID of the SID owner. The owner can be an individual or a legal entity. SID Owner’s Representative – Name, surname, NIF/VAT ID, email address, and phone number of the authorized representative. Legal Entity Representative – If the representative is a legal entity, provide the name, surname, and NIF/VAT ID of the individual representing that entity. Authorization Letter – Signed authorization letter confirming the representative’s authority to manage the Sender ID registration. Alias Justification – Provide the reason the company is entitled to use the Sender ID, such as the company’s official name, registered trademark, or inter
Required documents
Authorization Letter – Signed by the SID owner or authorized representative. Company Registration Document – Proof of the company’s legal registration. Trademark Certificate – Required if the Sender ID is based on a registered trademark. Domain Ownership Proof – Required if the Sender ID is based on the company’s internet domain. Registration Form/Excel File – To be completed by the client with the required Sender ID, owner, and representative details.
Need help registering your Sender ID?
Our compliance specialists assist with registration requirements, document review, operator approvals, and both domestic and international onboarding.