I can renew my TCP certificate

Cabin crew member certificates are issued for an unlimited duration and shall remain valid unless:

(a) suspended or revoked by the competent authority; or

(b) the holder has not exercised as a flight attendant during the preceding 60 months on at least one aircraft type; or

(c) the holder has completed the initial training more than 60 months ago without having exercised, after the issue of the certificate, as a flight attendant.

The certificate holder shall keep the necessary documents to be able to prove that the certificate is still valid.

In the event that the holder of the TCP certificate cannot prove that the certificate is still valid, the TCP certificate shall be deemed to be invalid.Para obtener de nuevo el certificado, ha de completar el curso de formación inicial.

Therefore, for the TCP certificate there is no concept of "renewal" as such.

Regulation (EU)1178/2011: CC.CCA.105, CC.GEN.030