In order to speed up the processing of the application, there is the possibility of submitting a telematic application through the catalogue of procedures and services of the EASA Electronic Headquarters under the name "LMA Part-66 Maintenance Technician Licence Management", in the section "Licences and Aeronautical Medicine":

LMA maintenance technician licence management (Part 66)

There is no process for validating aircraft maintenance licenses obtained outside the EASA environment. EASA only recognises for the issue of LMA Part 66, the training obtained and passed as set out in Annex III (Part-66) to Regulation (EU) 1321/2014. 
 
You can find information about the application for licenses in Spain in the “User Guide” at the following link.

Regulation (EU) 1321/2014 lays down in Appendix I to Part 66 the modules that need to be passed in order to access a particular category. Those modules that are common to two categories, may be used to obtain different categories or subcategories, if the module that has been passed in a certain category or subcategory has the same content with a level equal to or higher than in the other categories or subcategories to be obtained.

Operational aircraft experience means the following:

Relevant training serves to reduce the basic experience requirement to obtain a Part 66 LMA license.

Relevant training shall be considered:

Maintenance organisations which have not developed in paragraph 3.15 of the EOM the procedure for carrying out the OJT shall comply with the requirements set out in Guide AC-OJT-DT01:

This link includes the citation of a guide, the taskbook and the evaluation format.

With regard to the task book:

In relation to modules passed in EASA examinations, you will find information on how to apply for Certificates of Recognition on this link.

The subjects of each of the modules can be found in Appendix I of Annex III (Part-66) to Regulation (EU) 1321/2014, and its subsequent amendments.

According to point 66.A.30(e) and its relevant AMC, aircraft maintenance experience obtained outside a civil aircraft maintenance environment shall be accepted, where such experience is equivalent to that required by this Annex (Part-66) established by the competent authority. However, additional experience in civil aircraft maintenance will be required to ensure adequate knowledge of the civil aircraft maintenance environment. This experience shall be for category A at least 6 months and for categories B1, B2 and B3 of 12 months.

The process of transferring one license to another authority is as follows:

1. The holder of a licence issued by AESA intending to transfer his licence to an authority other than that which issued the first licence (AESA), shall request the transfer of his licence to the new authority.

2. It must be the Authority of that country that contacts the Spanish Authority through an official request for transfer, via email.