Despite the transfer from one crown to another, longstanding economic ties kept Hondarribia in a cordial position with the Kingdom of Navarre, especially regarding commercial relations that the town sought to keep open, beyond the almost endemic border conflicts the two crowns. Thus, taking advantage of truces established Castile and Navarre, the council of Hondarribia signed an agreement in 1245 with King Theobald I, by which it committed to protecting Navarrese people and their property:
“We, the provost, the jurors, and the entire council of Fuenterrabía: make known to all who see these letters, that we have, in good faith, received under our command and in our defense, for the duration of the kings’ truce, the men and women and all the goods of the Kingdom of Navarre, as far as our power extends, they paying in our town the customs they are due to pay. We must not receive in our town, nor under its authority, any wrongdoer or theft committed there, unless by order of our lord the King of Castile, or by him who holds the town for honor.”
The Cathedral of Pamplona continued to hold a series of bustalizas near Hondarribia the 13th and 15th centuries. Similarly, San Miguel in Excelsis held some according to documents dated 1371 and 1374.