620 film and paper is the same as 120 film and paper, just on a different spool. If they can develop 120, they should be able to develop 620, but discuss it with them.
Also, very important, be sure to ask them to save your 620 spools and give them back to you. If they can't do that, or are sending the film offsite that won't return the spools, find a different shop that will, or learn to develop it yourself.
620 film and paper is the same as 120 film and paper, just on a different spool. If they can develop 120, they should be able to develop 620, but discuss it with them.
Also, very important, be sure to ask them to save your 620 spools and give them back to you. If they can't do that, or are sending the film offsite that won't return the spools, find a different shop that will, or learn to develop it yourself.
Thats what I do. I just spool 120 film onto 620 spools, then after I shoot it I respool it back onto the og 120 spools to get developed, that way I dont have to worry about the 620 spools getting tossed accidently.