Sender digital or alfanumeric ID: which to choose for your business in Morocco

In Morocco, you can choose between two formats: 1. Alpha-numeric (e.g. Your MARK), which displays text. 2. Digital (e.g. 0612345678 or a shortcode), which displays a telephone number.

Choosing the wrong format can reduce your customer confidence, increase your integration costs, or worse, block your customers’ ability to respond to you.

The Sender ID Alfanumeric (Text) - Format: Up to 11 characters (letters and numbers). - Mode of operation: It is a channel unidirectional (One-way). The customer receives the message, but he has no "Respond" button on his phone, or if he tries to respond, the phone will display an error. - Moroccan Contract: Requires a manual whitelisting procedure from IAM, Orange and inwi (15 to 30 days).

The Sender Digital ID (Telephone Number) - Format: An international long number (+2126XXXXXX) or a short number (Shortcode of 4 or 5 digits). - Mode of operation: It is a potentially bidirectional (Two-way) channel. If the number belongs to you and is configured for receipt, the customer can respond to the SMS. - Moroccan counter: Using a standard long number (Longcode) usually does not require complex manual validation, routing is immediate (ideal for Sandbox mode tests).

This is the standard for 90% of professional B2C shipments in Morocco.

You must imperatively use an alfanumeric Sender ID for: 1. Authentication (OTP / 2FA): Receiving a security code from an unknown number 06X... is suspicious.Receiving from Your BANK reassures the user immediately.2. SMS Marketing campaigns: For branding, the user must identify the sender within a fraction of a second even before reading the content.3. Urgent transaction alerts: Fraud alerts, payment confirmation, delivery status.

Business impact: Studies show that the rate of openness and trust generated by an OTP sent via a branded Sender ID is significantly higher.

The alphanumeric is aesthetic, but it has a major disadvantage: it prohibits conversation. You must choose a Digital Sender ID (Virtual Longcode or Shortcode) in the following cases:

1. B2B or medical appointment confirmation: If you send "RDV reminder tomorrow at 2 p.m. Answer YES to confirm or NO to cancel", you must use a digital number in order for the customer to respond.
2. Interactive customer service: If you are managing SMS support tickets or want to migrate the conversation to hybrid logic (SMS to call).
3. Native opt-out: Although the CNDP requires that "STOP at 06XX" be included in the alfanumeric text body, having a digital number allows the customer to answer directly "STOP".

Alpha-numerical limits: - Administrative implementation time. - Risk of blocking if the content is deemed inappropriate by the operators (the operator blocks the entire brand).

Digital limits (shared long code): - If you use a shared long number provided by a foreign platform (e.g. a +44 or +1), Moroccan carriers massively filter these shipments for fraud (smishing).Your delivery rate will collapse. - If you use a real Moroccan mobile number (+212) behind a GSM gateway (SIM Box), this is strictly prohibited by ANRT.Your SIM card will be blocked from the first mass shipments.

Architecture Recommendation: For a modern project (e-commerce, SaaS, mobile app), use a hybrid approach. Request a Sender ID alfanumeric for all your one-way streams (OTP, critical alerts). For customer service or conversational transaction, switch to the WhatsApp Business API that natively manages two-way with a verified business identity.