LOA for Number Porting: Requirements, Template, and Tips

In number porting, a Letter of Authorization is the document that states you have the authority to move your phone number from the current provider to a new provider. The new provider uses the LOA to show the current carrier that the transfer request is valid and approved by the account holder.

The LOA creates a written approval trail that helps prevent unauthorized transfers, protects the account holder, and gives carriers the details needed to validate the request.

Phone providers use an LOA to confirm authority, match account records, and reduce the risk of number theft or accidental transfer. The current provider checks the submitted details against its own customer records before approving the port.

The LOA also helps the new provider coordinate the transfer. It tells them which number or numbers should move, who currently owns the service, which carrier holds the numbers, and who is authorized to approve changes. Without that information, the port request may be rejected.

The LOA itself is usually a required authorization document, which is usually free to obtain and submit. In many cases, your new provider gives you this form or asks you to complete one during the porting request.

While the document is free, porting a number may include a fee. Some providers or carriers may charge transfer fees, number setup fees, monthly number charges, or plan fees.

A number porting LOA should include enough detail for the new provider and current carrier to confirm ownership and process the transfer. The exact form can vary by country, number type, and carrier, but most LOAs ask for the following information.

Use the legal name that appears on the current phone account, not a nickname, brand name, or employee name, unless that is exactly how the carrier records it. For business accounts, include the company name and the authorized representative who can approve phone service changes.

The service address is one of the most important fields because carriers often compare it with the Customer Service Record or the recent phone bill. Copy the address exactly, including suite number, floor, ZIP or postal code, state, province, and country.

Include the name of your current provider, account number, and Billing Telephone Number if your provider uses one. The Billing Telephone Number may be different from the number you want to port, so check your bill or ask your current carrier before submitting the form.

List every number you want to transfer in the required format. If you are porting many numbers, attach a clean list or spreadsheet when your new provider allows it. Keep local numbers, toll-free numbers, or numbers from different carriers separate if the provider requires separate LOAs.

The LOA should clearly state that you authorize the new provider to act on your behalf and request the transfer from your current carrier. The form must be signed and dated by the account holder or an authorized person. Some carriers may require a wet signature, so follow the new provider's instructions before submitting.

Before filling out the LOA, gather your latest phone bill, account details, current provider name, authorized signer information, and the exact list of numbers you want to port. Then complete the form carefully so the current carrier can approve it without sending it back for corrections.

1. Use the correct LOA form for your number type, country, and provider. Local, toll-free, mobile, and international numbers may have different requirements.
2. Enter the account holder or business name exactly as it appears with your current carrier.
3. Copy the service address and billing details from your latest bill or Customer Service Record.
4. Add the current provider name, account number, and Billing Telephone Number when required.
5. List the number or numbers you want to port, and separate numbers by carrier or country if needed.
6. Read the authorization statement and make sure it gives the new provider permission to request the transfer.
7. Sign the LOA, then submit it with any required documents, such as a recent bill copy or CSR.

Most LOA problems are preventable. Before submitting the form, ensure every piece of information is accurate.

1. Name or address mismatch
   Even small differences can slow approval. Use the legal account name and service address from the current carrier record, including abbreviations, suite numbers, and postal codes.
2. Missing account number or BTN
   Some carriers need the account number or Billing Telephone Number to locate the correct account. If you cannot find it on the bill, ask the current provider before submitting the LOA.
3. Wrong, inactive, or disconnected numbers
   Numbers usually need to remain active until the port is complete. Canceling the old service too early can stop the transfer or force your team to restart the process.
4. Multiple carriers on one LOA
   If you are porting numbers from different providers, countries, or number types, you may need separate LOAs. Grouping the wrong numbers can create confusion and rejection.
5. Unclear corrections or messy forms
   Crossed-out text, unreadable handwriting, or edited fields can make the form look unreliable. Use a clean form and type details whenever possible.
6. Wrong signer
   The person signing should be the account holder or an authorized representative. A signature from someone without account authority may not be accepted.

After you submit the LOA, your new provider reviews the form and supporting documents. If the information looks complete, they send the request to the carrier network or current provider for validation.

If the current carrier approves the details, both providers coordinate a porting date. On the scheduled date, the number moves to the new provider.

If the LOA is rejected, ask for the exact rejection reason. Then correct the mismatch, update the LOA or current carrier record, and resubmit the request. Do not cancel your old phone service until the number works properly with the new provider.

A Letter of Authorization is a key document for phone number porting. It proves that the authorized account holder gives permission for the new provider to request the transfer, and it gives carriers the details they need to validate the request.

To avoid delays, make sure the LOA matches your current carrier records, includes every required field, and is signed by the right person. Keep your current phone service active until the port is approved, completed, and tested. Once the number moves successfully, your team can continue using the same business number on a better phone system.